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ServiceManual
Trucks
Group
370-500
CircuitandWiringNumbers
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Foreword
The descriptions and service procedre @ntain€d h thb manml are based on designs and methods studies cariod qn tp b Arglrst 00.
The products are under contirnE An|opment VbhiJG and components produced
after the abore date rray thel*le havs dhtstt speancaions and rcpair methods.
When this is believ€db haue a obnificant beadng m thb manual, suppbmentary service bulletins will be issued b ooor the cfiangps.
The new edition d Ots rsrrd
wil Wdate the ctnnges.
ln service proceduc whete |ho lide incorporatesan operation number,this b a rebrence to an S.R.T.(Sgr<hd RepairTime).
Service procodrc u,l*$ do not indud€ an operation number in the tiile are br gpneral inbrmalirr ad rp r*rcnco b made to an S.R.T.
The blbrrlrg l6€b of obsenations, cautions and warnings are used in this Service
Documentdin:
]lob: Indcabe a pt@dure, practice, or condition that must be blloryed in order to
have tfie v€l*to d @tnponent funaion in the manner intended.
Cautbn: Indcabe an unsafu practice where damage to the product could occur.
Wemlngr hdces
prcduct o.5 er.
an unsab practice where personal injury or severe damage to the
Dangec hdcales an unsafe practice where serious personal iniury or death could occur.
VolvoTrucksNorthAmerlca,Inc.
Greensboro.NC USA
Order number: PV77&TSP1/I5180
NC USA
@0o VolvoTrucksNorthAmerica,Inc.,Greensboro,
j
,
storedin
All rightsreserved.No part of this puuicationmay be reproduced,
retrievalsystem,or transmittedin any formsby any means,electronic,mewithoutthe priorwritten
recordingor othenrvise,
chanical,photocopying,
permissionof VolvoTrucksNorthAmerica,Inc..
Contents
General
CircuitNumberIndex """"'
Circuitand WiringNumbers
Wire and Cable NumberMarking
Wire Color
Numbers
ElectronicSub'systemCircuit
CircuitSufiixes
CircuitGroups
Definitions
Speciffcations"""""""
CircuitNumbers
BodybuilderCircuits
0: Ground
1-19: PrimaryPoruer
2H29:Folarity ReversingCircuits
3049: Headlampsand Fog Lamps
Lamps
5049: Markerand Clearance
70-89: StoPLamPs
90-109: Tailand FarkingLamps
110-129:Tum SigrralLamps
130-139:S€condaryLamps
Lamps
14O-149:Insnn'rnont
Ot'ft*t"r and Air Conditioner
15O-179:t*"f
180-219:Instrutnents
%(.;2iy,:Cab l'k*r
2&2K9:lgrriliin
2fi/-:279:l'lorns """"
280-299:Sfarter
300-309: CompressorCludl
310429: Transmission
330-339:PowerSeat"""""
340-349:PowerVent"""""
35f359: PowerWindow
360-369:StartingAids """""'
37f379: CigarUghter """"""""
380-389:WindshieldWiper """"
390-399:ElectricFuel Pump
400-409: Oia$ostics and Gonrol
410*419:Back-upLamps
420459:lndicatorLamps
460-489: RearAxle
490-499: Radio """"
Lamps
500-549:Miscellaneous
Electronics
550-599:Engine
600439: EngineControls
Wiring
680499: ni' CoiJitioning Control
700-709:HeatedMirrors
71H719:Door Locks
72Gi729:SafetyanOWarningSystems
""""""""'
730-799:Anti-lock(ABS)Control
Transmission
800-850: O*t"ti"
900-910:DetroitDieselFeeds
""""""""""
"""""
"""""""""""""
""""""'
""""'
"""""""""""'
"""""""""""
""""""""""""'
"""""""
3
3
3
3
3
4
4
5
6
"""""""' 7
7
""""""""""""'
""""""" 7
""""" 7
""""""' 8
"""""" I
""""" 9
10
""""""""""""
""""""' 10
"""""" 10
""""""""" 11
11
"""""""""'
11
"""""""""'
"""" 12
""""' 12
"""""" 14
""""""""' 14
"""""' 14
""""""""' 14
14
""""""""'
"""' 15
"""""""""" 15
"""""""""" 16
16
"""""""""""'
""""""""' 16
"""""' 16
"""""" 17
""""""""" 17
""""" 17
"""""""""""' 18
18
"""""""""""
"""""" 18
"""""' 19
""""""' 19
""""""""" 20
22
"""""""""""
24
"""""""""
24
""""""""""""
""""" 24
24
""""""""""'
""""""" 25
""""" 26
"""""""' 28
950.959:Protected"BranchConnectofCircuitFeeds'.............'...28
J
o
970-979: Inverter
990-999:AuxiliaryCircuits
Feedbad<
................24
.....................
29
General
Grcup 37 Orcuil and Writg Mn$ers
General
CircuitNumberIndex
L
Circuitand WiringNumbers
Wireand CableNumberMarking
All wire and cable smallerthan 0 AWG (AmericanWire
Gauge) is imprintedwith circuit and wire numbers.The
circuit numbeF are imprintedrepeatedlyevery two to
three inches (50 to 75 mm) horizontallyalong the entire
length of the wire or cable. In cases when imprintingof
the circuit numberon the wire or cable is not practical
(e.9. multipleconductorcable) circuitnumber markers
will be appliedone to two inches (25 to 50 mm) from the
terminal or end of cable.
WireColor
Note: Allwire used in the vehicle has a cross{inked
polyethyleneinsulation(XLPE).lt compliesto SAE standad Jl128.
BLACK
Fused power and signal
WHITE
Ground
RED
Unfusedbattery
MULTI.
COLOR
Wire harnessesmaybe usodas interdefinitirnof
facesto someoomponents;
multi-colored
wiresvariesby oomponent.
L
General
Group37 Circuitand WiringNumbers
ElectronicSub-systemCircuit Numbers
The.ga,ased use of electronicsubsystemsttas caused
tnq fraion
of vendor circuit identilitptinn numberc
whLlrld
conflict with the existing Voho circuit rumbers. For example,circuit number209 ean be oihor
Volvo Transformer-RectifierSystem Volbneterfrdhp'
Feedor CumminsPaceTachometer.To aw*l0is s>
flict and still reAin the vendor circuitnumbors,a pldu
has been added to the vendor circuit rxrr$ots.
This prefix will ldentify the circuit as a wn&r Cectonb
subsystem.For examplecircuit209 rivotldbe nfrd as:
ffit
llertrr
l
A
Allison
B
Caterpi!lar
c
Cummins
D
Detroit Diesel
E
VDO
L
Delphi Delco Electronics
2Og
Volvo circuit
M
Meritor
C2Og
Cumminscircuit
P
Delphi PackardElectronics
o
Qualcomm
T
Eaton Bosch EBS
V
Eaton VORAD
Note: The prefix added b wn& del
cfy rylles to
Volvo-suppliedwiring harnc.
lhat come
OQcris
with their own widng ]ramecc tdr r dcctonbdy
controlleddiesel enghos, d rU&tr
rumbering
of cirsystem explained h trb nsrd. fcffidbn
see
cuit numberc/colcrso w&r#d@fiponents,
the component manubctrrf
brdrre.
ffi
For inbrmation on tenrr d
"Definitions"page 6.
&lbrc
The table (seetaHe pagB 4) b
soor rvendor.
FSGs
see
and the cone-
rt
ClrcuitSuffixes
Design of branch circrls H clghae from a base circuit may contain a hl4hil-d
rfix. For example, if
circuit0 requiresa sploe b ad two branchcircuits,then
those branch circuib may bc bbefed fA and fB. The
text that appearc dtor $e al|bc separator does not apply
to the function cf the ciqt grd b herefore not listed.
Circuits functionaly tobd b a liwn base circuit are often created icr new desiglrs. Th6e circuits appear
withod a tryphended 6rahr For example, circuit 0A (the
main altemator groud) b rehed to circuit 0 (the main
vehicle ground). Please n6 ttd a functional relationship does not imply electical continuity.
Grcup 37 Circuitand Wiring Numbers
General
CircuitGroups
"BodybuilderCircults"page 7
%0f409: Diagnosticsand Control"page 17
'0: Ground"page 7
"1-19: PrimaryPoref page 8
"410419:Back-upLamps"page18
2f29:
PolarityReversingCircuits"page 9
L--,
"420459: Indicatorlamps" page 18
"460-489: Rear Axle" page 18
3f49: Headlampsand Fog Lamps" page 9
"50{9: Marker and ClearanceLamps"page 10
'7F89: Stop Lamps"page 10
"49O-499:Radkf page 19
'5(X}-&[9: Miscellaneouslamps" page 19
"55f599: EngineElectronics"page 20
'9f109: Tailand ParkingLamps"page 10
"110-129:TurnSignalLamps' page 11
"600{39: EngineControls"page 22
"680{99: Air Conditioning
ControlWiring"page 24
"130-139:SecondaryLamps"page 11
"70f709: HeatedMirrors"page 24
"71V719: Door Locks" page 24
'14f149: InstrumentLamps"page 11
'15f179: Heater,Defrosterand Air Conditionef page
12
"18f219: Instruments"
page 12
22r.239: Cab Hoisf, page 14
24r.259: lgnition' page 14
260-279. Horns" page 14
"28r.299:. Startef page 14
30O-309: CompressorClutch"page 14
31f329: Transmission'page 15
'33f339: PowerSeaf page 15
'34G-349: PowerVenf page 16
"35O-359:PowerWindow" page 16
"36f369: StartingAids" page 16
"370479: Gigar Lightef page 16
38f389:
WindshieldWipef page 17
39f399:
ElectricFuel Pump" page 17
"720-729:.Safetyand WarningSystems"page 24
"730-799: Anti-lock(ABS) Control"page 25
"8OO-850:AutomaticTransmission'page 26
"900-910: DetroitDiesel Feeds"page 28
950-959: Protected'BranchConnectof Circuit Feeds"
page 28
1970-979:Invertef page 28
39O-999: AuxiliaryCircuits"page 29
General
Definitions
APA:A^
r,[
-_y I
Air ConditioningprotectionAnd DiaoF
nostic System (or A/C Di{lgnostic
Sysrem;
ATC
Automatic Traction Conrot (abo calod
TCS or traction oontol qfsbml
ATC
Automatic Temp Contol
CAN
Controller Area l,letiqk (aq*td
with Jl939 data tink)
DLO
Differential Lock Out
DRL
DaytimeRunningLifrtc
ECU
Electronic Confrol l.lfl
EECU
Engine Etecto*: Cfil
EMS
EngineMan{lrr|*n
EOL
End Of Lire
EpL
Eaton proprbEy tt
HVAC
HearingAbrffoilllOondtining
lSi,UlSX
CumminsEfi.fh.
J1s87lJ1Zo|
Data Unk
,t\_||
Hish-spe€d
h rn(
NC
NormaflyCb-
NO
PTO
Normafyeo
FonerT&{l
SAE
Sodetyd fubrdr,€
SRS
SupplemertalRertrairt System(Airbag)
VECU
VehirjeElectq*: Contot Unit
-t
tffi
Engineerc
\r
Group37 Circuitand WiringNumbers
Specifications
Specifications
CircuitNumbers
BodybuilderCircuits
0.J
o
r
PTO- NormallyClosed
0L
Lighter- Cigar
A312NO
PTO- NormallyOpen
0M
Markerand Turn Signal
A314CM
Auto Neutral- Common
OMA
Markerand TurnSignal- Left Hand
A314NC
Auto Neutral- NormallyClosed
OMB
Markerand Turn Signal- RightHand
A314NO
Auto Neutral- NormallyOpen
ONV
InverterPowerGround
BAT
12-VoltBattery
0P
Panel-Instruments
BATT
12-VottBattery
OPA
PrimingPumpSupplyReturn(Cummins
IGN
lgnitionFeed
NEU
12-VohNeutralStart Feed
OPB
ParkBrakeGround
OPP
PumpPressureGround
0: Ground
OPTO
PTOGround
ABS
Antilock Brake Sysiem Gound
OR
Relay/Solenoid
0
Engine or Main Grcund b Cab
0S
Speedometer
0A
Alternator
0T
VOA
VORADFrontAntennaGrcund
o Trailer
o CentralTireInflation
0B
Bloryer- Heater
OV
StartingAid
VOB
VORAD Driver DisplayGrcund
OVA
OvercrankProtec{ion(OCP) Ground
Jumper
0C
Console (Accessories)
OVB
EtherStart SensorGround
rcG
VORAD PowerGround
OW
VOC
VORADSide Sensor/SideSensor Display Ground
WamingSystem (Air, Oil, Water,Wiper,
Kysor)
0X
ElectronicGround
0D
DifferentialLockout
OXA
ClusterElectronicGround
0E
ExhaustBrake
PowerTiake-Off
OXB
OEP
SRS ECU ElectronicGround
0F
Fuel
OXC
Cab ElectronicGround
OG
WindshieldWiperM/asher
OXE
ECU ElectronicGround(BAT-)
oGA
Snorr plortrLamp - Right Hand
0Y
AutomaticTransmissionGround
OGB
Snow PlovrrLamp - Left Hand
OYA
Automatic
Transmission
ECUGround
OGS
Snou Plow Lamp
OYB
0H
Headlamp
Automatic
Transmission
ECU
t
{,
Diagnostic
Ground
OHS
Headlamp
A312CM
PTO-Common
A312NC
OZ
HVAC lamp
Lift Axle
tsx)
l
Group37 Circuit and Wring Numbers
1-19: PrimaryPower
1
./tr ^
Specifications
15
Alternatorlgnition"NoCharge"Resistor
Feedto Regulator
Cab Unswitched Battery Feed
to\t
Battery
Feed
torsni,"#Hji:y*hed
16
Alternatorlgnition"NoCharge"lamp
Feed
1AD
lconThermostat
Fower
17
Unswitched
BatteryFeedto EECU
1B
Cab UnswitchedBatteryFeedb Tum
SignalMaxiFuse
174
EECUUnswitched
BatteryFeed
17AA
Fused'17A'Feed
1C
Cab UnswitchedBafieryFeodb ltlal(i
Fuse
178
EECUUnswitched
BatteryFeed
17BB
Fused'178'Feed
1D
Cab UnswitchedBafieryFo€db l{axi
Fuse
17C
EECUUnswitched
BatteryFeed
1P
12 VottBatteryPlfiectin
17D
EECUUnswitched
BatteryFeed
1PA
12 VoltBatteryhclion
17E
AntilockBrakeSystemUnsvvitched
BatteryFeed
lPB
12 VoltBatteryPtGcdqr
17F
lPC
12 VoltBatteryhcton
Electronic
EngineUnswitched
Battery
(non-Volvo)
Feedto Transmission
lPD
12 VoltBdery bdfn
17FB
Transmission-generated
BatteryFeed
2
AmmeterbCht Boalors, Switches,
VoltageRe$ffrq Eb.
17FF
Fused'17FFeed
17NV
lnverterUnswitchedBatteryPoarerFeed
3
GenerabrAmntr€ b \loltage
Reguldor
18
Electronic
EngineSwitchedBattery
Feed
Genersr Fb5 (F1)
184
SwitchedBatteryFeedto EECU
Voltagoneqf-r
Srpply
188
SwitchedBatteryFeedto EECU
18C
Elec'tronic
EngineSwitchedBattery
Feedto CircuitProtection
18D
Electronic
EngineSwitchedBattery
Feedto Throtte Pedal
.(J|t
lgnitlrn" Terminal
6
VoltagBnegier'Armature" Terminal
to Recffier
7
Alternabrb Rectifier
8
Lod Babry b Alternator
18E
I
S€lf toa&Un*ling Alternatorto Voltage
Regul&r ? Terminal(Sensing)
Electronic
EngineSwitchedBattery
Feedto EECU
18G
ElectronicEngineSwitchedBattery
Feedto Geabox
18V
Electronic
EngineSwitchedBattery
Feedto VECU
18X
Electronic
EngineSwitchedBattery
Feedto EMS"A" Supply
18Y
Electronic
EngineSwitchedBattery
Feedto EMS"B'Supply
"R"TerminalSignal
Afternator
10
Gener&r Firld (F2)
11
RelayRecnifier
to VoltageRegulator
(lgnition)
12
Alternatorto Ammeter
13
Altematorto Start Battery
Alternator"NoCharge"lamp Feedfrom
AltematorReguldor
14
14A
1.\t
Alternator'NoCharge"lamp Feedfrom
AuxiliaryRelay
19
20-1292
PolarityReversingCircuits
36
Driving lamp Switch Feed
37
Drivinglamp Feed
37L
Drivingl-amp Feed- LH
AJternatorNo-ChargeRelayto Alarm
Buzzer Feed
37R
DrivingLamp Feed- RH
Alarm Buzzerto Diode Feed
38
Driving/FogRelayControlFeed
39
o
o
39A
DrMing/FogSwitch Indicator
n
DRL ModuleBattery Feed
41
DRL Module lgnitionFeed
42
DRL Module Park BrakeSignal
44
ParkingBrake Switch
43
DRL lndicatorlamp
tlSA
DRL Control Relay Feed
u
DRL Module Lorv Beam Feed
45
DRL High Beam Disable
20
Lory Air Switch Neutral Wre
21
Alarm System Neutral Wire
214
218
30u-49:Headlampsand Fog Lamps
HeadlampSwitch FeecUSplit
SystemLH
30A
HeadlampSwitch Feecl/SplitSystemRH
30L
HeadlampFeed- LH
30R
HeadlampFeed- RH
31
DimmerSwitch Feed
31L
Dimmer Switch Feed Split System LH
31R
Dimmer Switch Fe€d/ Split SysilemRH
32
Headhmp Lon, B€am Circdl
32L
Headlamp Low Beam - LH
32LA
Headlamp Flash Option - LH
32R
Headhmp Low Beam - RH
32RA
HeadlampFlashOption- RH
32RB
HeadlampFlashOption- RH
gt
HeadlampHigh Beam Circuit
33A
o
o
3itB
High Beam lndicatorlamp Ground
EIF
Flash to Pass Contact Feed
3ifL
HeadlampHigh Beam- LH
33R
HeadlampHigh Beam- RH
u
Fog lamp Switch Supply
34A
Aux. Lamp Switch Feed
35
Fog lamp Feed
3sL
Fog tamp Feed - LH
35R
Fog Lamp Feed - RH
^-:-:r:s
I
Yt
Driving/FogRelay Feed
LED Supplybr Aux. lamp Switch
High Beam RelayControl Feed
Flashto Pass ControlSupply
L,'
Specifications
Group 37 Circuitand Wiring Numbers
5GS9: Markerand Clearance
htT
o
o
Marker and Tail tamp Switch Feed
Master LightingSwitch Supplybr
Tractor Lighting- VN Only
soA
o
TrailerMarkerand Tail tarp
Switch Feed
Master Lighting Swihh Srpply br
TrailerLighting- VN OnV
o
51
Trailer Marker and Tail Larnp Feed
52
Overhead Cab Marker tarp Fe€d fiotn
lntenupterSwibh
52A
Marker Intentryter Srihtr Sttpply from
Master Ugtrthg Slilctt
C€nbd Tile Infrdbn ECU from Marker
tamps
ICC Trater }larker and Clearance Lamp
Fe€d from Intenupter Switch
Marker IntenupterSwitch Supplyfrom
Master Lighting Switch
54
Cab Marker Lamp Switch Feed
:r,
Cab Marker lamp Circuit BreakerFeed
56L
Side Marker Lamp Feed- LH
56R
Side Marker lamp Feed- RH
EI
Marker lamp Relay Feed
58
Marker lamp Relay Control Feed
59
Beacon lamp Feed
59A
Beacon Lamp Feed
598
Beacon Lamp Feed
r0
10
Side Marker lamp Feed
70-89:Stop Lamps
70
Stop Lamp Switch Feed
71
TractorStop Lamp and Trailer
Receptacle Feed
714
Stop Lamp Switch Ouput
7i2
Trailer Stop tamp Feed
7:l
Spdng Brake Stop lamp Switch Feed
74
Trailer EmergencyStop
75
Stop Lamp Relay Coil Feed
75A
ECU Stop lamp Coil Feed
758
Trailer Stop Lamp Relay Coil Feed
75C
Tractor Stop Lamp Relay Coil Feed
76
Tractor Stop Lamp Relay Feed
TI
Trailer Stop lamp Relay Feed
9(F109:Tall and Parking Lamps
90
TractorTail tamp Feed
9oA
o
o
908
HVAC tamp Contol Switch lllumination
91
Farking lamp Switch Feed
g2
hrking lamp Feed
TractorTail Lamps ON Output
Radio llluminationSupplyfrom
Master LightingSwitch- VN Only
_-.!
Group37 Circuitand WiringNumbers
11F129:TurnSignalLamps
Specifications
13F139: SecondaryLamps
110
Turn Signal FlasherFeed
130
Courtesy& Dome Lamp Switc[ceed
1108
Turn Signal FlasherFeed
131
Courtesy& Dome famO fe{
111
Turn Signal Switch Feedfrom fuse
1318
Bunk LightingMaster Feed
Hazard Switch to Fuse Feed
132
111A
SleeperCompartmentReadingLamp
Feed
112
FrontTurn Signal [amp, TrailerRecep
tacle and IndicatorFeed- LH
1E
TrailerDome Lamp Switch Feed
134
TrailerDome Lamp Feed
1124
Hazard Switch Feed to Fuse
135
Luggage Elomel-amp Feed
113
FrontTurn Signal Lamp,TrailerRecep
tacle and IndicatorFeed- RH
135A
LuggageLamp Feed RH Side
135B
Luggage lamp Feed LH Side
113A
HazardSwitch Feedto Fuse
136
Utility Spot lamp Swttch Feed
vl13
VORADRightTurn Input
137
UtilitySpot Lamp Feed
114
Turn Signal IndicatorFeed
138
Bunk ReadingLamp Switch Feed
115
LH Stop and Rear Turn Lamp Feed
139
Back of Cab Lamp Switch Feed
116
RH Stop and Rear Turn Lamp Feed
139A
Back of Cab Lamp Switch Indicator
117
LH Tail Lamp Feed (TurnSignalSwitch
Control)
139B
Back of Cab Lamp Feed
118
RH Tail lamp Feed (TurnSignalSwtbh
Control)
119
Turn Signal Fuse Feed
1N
Turn Signal Repeaterlamp Feed
121
Hazad WarningSwitch FlasherFeed
122,
Tractor Stop Lamp Relay Feed
1nA
LED Feed Hazard Waming Swibh
122'8
Hazard Swttch Feedto Fuso
14(F149:InstrumentLamps
1/|()
lnstrumentLamp Switch Feedl
stat Feed from HeadlampSwitQ-.
o-
140A
Aux.LampEnableRelayCoil Feed
140P
Instrument
lamp SwitchFeedto ProDriver
141
Instrument
LampFeed
141A
lnstrumentLampFeedto Option
Connector
141R
Instrument
LampFeedto Radio
v
11
Group 37 Circuit and Wiring Numbers
Specifications
15F179: Heater,Defrosterand Air
Corjitioner
18(F219:Instruments
180
Main lnstrumentFeed
181
Water TempSender Feed
150*r
{!lt a
HeaterSwitch Feed/ 12V Fe€db
AC/HeaterBtoryver
1&l
EngineOil PressureSender Feed
151
DefrosterSwitch Feed
1E3
Fuel TankSender Feed- LH
152
Left Hand Heater Feed
184
Fuel TankSender Feed- RH
153
Right Hand Heater Feed
185
Fuel GaugeSwitch Feed
154
Left Hand Defroster Feed
186
FuelTank SelectorSwitch Feed
187
BlortrerMotor Speed (l-c)
FuelTank SelectorValve Feed
155
188
Oil and Water Alarm IndicatorFeed
156
Blower Motor Speed (lI$)
189
Oil and Water Alarm Switch Feed
157
Air Conditioner Cfqa Blr*r
190
158
Air Conclling
ElectricTachometerSenderto HeadNegativeor Pyrometer Feed
191
159
Bltrer Mmr$...1QleCun)
ElectricTachometerSenderto HeadPositiveor Pyrometer Return
160
Defrosbr Fm 9..d
19!!
TachographFeed
161
Bliler llOr$..d
194
162
Circuil &e&
Al Cmdlimer Relay
Conrol Col F!.d
195
Tachographlamp Feed
lgnition Switch "Accesso4f Relay Coil
Feed
1954
Accessory Relay Feed to Vehicle Loads
195D
Optimizedldle No-StartRelayCoil Feed
lgniton Switch "lgnition"RelayCoil
163.
',Ultt
-
Bunk Blml
fcrOnoQ
lbb
Feed
Gdsry)
(llaxinum)
Fo€d
+12V Feod b Fertirg Heater Motor
165
Fartdrg l{eabr Rrd Pump Supply
166
Fadnp lbabr Frcl Pump Return
167
Farfdp llosrThennostat
168
Parfdrg Heder Temp Sensor Outpd
169
Farldrg Fleater LED O'Xput
17O
Farking Heater Thermostat Ground
171
Fa*ing Fleater LED lnput
172
196
Fe€d
Dl96
Detroit Diesel Optimized ldle System
Fe€d
196A
lgnifibn Rehy 1 Feed to Vehicle Loads
196AA
lgni$on Feed to Fuses 1 - 7
196A8
lgnifon Fe€dto Fuses 8 - 14
vl96A
VORAD Front Antenna Power
1968
lgnition Relay 2 Feed to Vehicle Loads
1968A
lgnifronFeedto Fuses 46 - 51
Farking l'leder rOn" Signal
vl968
VORADDriver DisplayPouer
173
Bunk Unit Wder Valve Return
196C
Data Display lgnition Feed
174
Bunk Unit Water Valve Feed
vl96C
VORADSide Sensor/SideSensorDisplay Porcr
175
Bunk Unit BbuyerRetum
196D
lgnitbn Feed Spliceto ABVBrakes
196DR
DR Feedto Splice
t'
12
Outrut
SPecifications
Group
. 3T Circuitand AliringNumbers
196G
DR Feed to Gearbox
215
SpeedometerHead to Sender
196R
lgnition PowerRelay2 Coil Feed
21sA
1967
lgnitionFeed to DiagnosticTool
196V
DR Feedto VECU
216
rtrol
PositiveSpeedometerSignall-ModuleSpeed Limiter
V
TachometerHead to Sender- Ground
196W
DR Feedto Wiper Relay
217
TachometerHead to Sender
196X
lgnition Feed to CentralTire Inflation
218
lgnitionFeed- Clock
196Y
lgnition Feed to Camera Prep
219
ClusterDisplayCommonOutput
197
Buzzer Feed
219A
ClusterDisplayEscape Input
vl97C
VORADSide SensorSignal
2198
ClusterDisplayDorn Input
vl97D
VORADSide Sensor DisplaySignal
ClusterDisplayUp Input
Low Air SystemWarning
219C
198
199
Air Filter RestrictionSwitch Feed
219D
ClusterDisplaySelect Input
199A
ECU PressureSwitch Feed (Central
Tire Inflation)
21gE
ClusterDisplaySet Input
219F
ClusterDisplayMode Input
200
TachographHead Feed (Battery)
IPJl
ClusterJumper(1996ClusterVN Only)
nl
HourmeterFeed
IPJ2
ClusterJumper(1996ClusterVN Only)
n2
o
IPJS
ClusterJumper(1996ClusterVN Only)
IPJ4
ClusterJumper(1996ClusterVN Only)
TachographRemde Contol Sttidl
Feed
IPJs
ClusterJumper(1996ClusterL;r'rl
2U
EngineOilTemp SendingUnilb Gauge
IPJ6
ClusterJumper(1996ClusterVN Only)
205
Electric Speedometer Feed
,Pn
ClusterJumper(1996ClusterVN Only)
m6
Low Oil PressureAlarm Feed'Eleclric
ClusterJumper(1996ClusterVN Only)
21,7
Water Temp Switch or Alarmstat
"NormallyOpen'Feed
IPJs
qrl
c"t2
ClusterJumper(1996ClusterVN Only)
cr3
ClusterJumper(1996ClusterVN Only)
G'4
ClusterJumper(1996ClusterVN Only)
cJ5
qr6
ClusterJumper(1996ClusterVN Only)
qr7
ClusterJumper(1996ClusterVN Only)
G'8
ClusterJumper(1996ClusterVN Only)
G'9
ClusterJumper(1996ClusterVN Only)
o
Battery - Generabr Gauge Feed
(Load)
Instrument Fanel Feed UN only)
System SecTransformer-Rectifier
ondary BatteryCharge IndicatorFeed
(Storage)
ier SystemVoltmeter
Transformer-Rectif
"Fositive" Feed
210
Transformer-ReaifierSystem Voltmeter
"Negative"Feed
211
Diode Commonto Buzzer
212
Clock Feed- Alarm/Radio
213
Porer Feed to InstrumentPanels
214
SpeedometerHead to Sender- Ground
ClusterJumper(1996ClusterVN Only)
ClusterJumper(1996ClusterVN Only)
13
Group37 qipltrt elqlA/iringNumberc
220-.239:Cab Hoist
;U
Soecifications
^80 299: Starbr
Cab Hoist PanelSwibh Feed
n
$arbr S*noit
Cab Hoist Control Swihh Feod
,l
Series Farafel Sritsh Tsnird
Solenc*l on $arter
&,
S€d€s Farallel S\i,itsfi Terniral *4 b
Sol€noid on Starter
Col Fe€d
t5 b
22
Cab Hoist Solenoid SI,ibtt Col F!.d
%
Cab Hoist SolenoirJS\fliHt Cof hd
24
Cab Hoist Solenc*l ST,i$ Fe.d
A
Starter push Button Snitch F€ed
nS
Cab Hoist Motor Armilne Facd
A4
12 Volt Starter Contrcl Solenoid Feed
%
Cab Hoist Safety Swibh Food
2l4A
12VoltOptimizedldle RelayFeed
ffi
12VohNeutralStartFeed
24rl259: lgnition
N
12VoltStarterSolenoidFeed
2&
lgnitbn ccil Feed
28sA
i2 Voftstarter Feedbr sorenoidRetay
241
lgnitirn Col b lbtubr
M
MagneticSwitchControl
242
lgnilirr Col Resisloror DieselFuel
Valro Feed
243
lgr*lbn Su,ihhFo€d(B+)
243A
l-ockSwihh tusition Feed(30)
2U
lgnifon SafetySwitchFeed
2S
I
\qt
:-
o
o
o
lgnitionFuel HeaterControl Feed
VOLVOEngine- Engine Pre-heat
Circuit ProtectionFeed
Detroit Diesel Engine- Diagnostic
Request/ Shutdoun Engine
Override Feed
30(H09: CompressorGlutch
300
3qrA
Air ClutchSolenoidValveFeed
ManualFanSwitchFeed
3qrB
APADSModuleFeed
3O0C
VECU A/C RelayCoil Feed
3mD
VECU Manual Fan Control l/P
3O1
Air CondiUoningCompressorClutch
Fe€d
aoro
Air conditioningconrpressorcrutch Retlm
2454
circuit Breakerto Time Relay signa'
26
Diesel FuelVatueRelay Control
247
Fuel Switch to Magnetic Switch Feed
W2
Cold Controlswitcfi Feed
28
lgnitionSenderSupply
3OtlA
Air ConditioningSwitch Feed
24€,A
lgnitionSupplyto Oil PressureSender
3{}128
Air ConditioningFeedJumper
*2C
Air Conditioning
ControlFeedJumper
2611279:Horns
303
DryerReceiverLor FreonSwitchFeed
260
Electric Horn Relay Feed (Battery)
3O4
Lotv Freon Switch to Ovenlde Valve
81
Electric Horn Feed
305
Normally Closed Freon Switch Feed
ft2
ElectricHorn Button
3OO
Freon Switch and On/Off Fan Ovenide
Valve Feed
8A
ElectricHorn Relay NC
n7
26128
Or/Off Fan Switch Feed
ElectricHorn RelayCommon
308
26d'.,5r
Air ConditioningRelay Feed
Air Horn SolenoidFeed
3Og
2il
Air Horn Bufton
Cold Control Switch to Air Conditioning
Relay Coil Feed
14
Spec*ncaions
Grcup37 Oircuitand Wdng Numbes
31(H29: Transmission
3?2A
EatonUghtringShiftltuob Ground
310
Feed
NeutralSwitch
Transmission
g,'
EatonUghtringShiftKnobGil5s
311
RangeControlSwitch
Transmission
Feed
g2g
Relayto park pressur"g*n"nl
311A
EatonLightningsplitterswitchsignal
324
3118
EatonLightningsplitterswitchsignal
ParkPressureSwitchto Alarm
"DoNotshiff warningLampReturn
311C
MeritorG Low SolenoidFeed
311D
MeritorG High SolenoidFeed
327
AutomaticTransmissionFeed
312
TransmissionArea lnhibitorValve Feed
g2g
pTO Switch to ECU
312A
TransmissionArea lnhibitorValve
Return
329
EngineBrake SelectSwitchto TransmissionECU
3128
TransmissionRange InhibitorValve
Feed
g12c
Valve
Rangelnhibitor
Transmission
33(H39:
Return
33O
power Seat Relay Feed
312D
Eaton Lightning Protected Battery Feed
gggl
power Seat Feed LH Side
313
TransmissionNeutrallndicatorLamp
Feed
33OR
power Seat Feed RH Side
314
TransmissionOilTemp SendingUnit
Feed
331
Power Seat Control Switch Feed
332
PoiverSeat UP Circuit
325
326
lgnitionFeed to VehicleInterfaceMode
(vrM)
POWef Seat
315
CIl PrcssureSendingUnit
Transmission
33il
PowerSeat DOWNCircuit
316
TransmissionHigh OilTemp $ribfi
Feed
335
PowerSeat REAR Circuit
g17
lndicator Lamp Switch Feed
E16
Heated Seat Feed
31ZA
TransmissionLorv RangeIndicator
switch Feed
336L
HeatedSeat Feed Left
336R
Heated seat Feed Right
3178
TransmissionLow Range Indicator
SignaltoVECU
317C
EatonLightningServiceLamp
317D
Eaton LightningServiceLamP
318
FonryardIndicatorLamPFeed
319
Reverselndicator[amP Feed
32O
AuxiliaryTransmissionOil Temp
SendingUnit Feed
321
High OilTemp IndicatorLamp Feed
322
Neutral Switch/Shift Lever Control Relay
Feed
I
CircuiP
rt FORWARD
',
u
15
Specifications
Gror.rp
. 3T Circuit and ViringNumberc
36(H69: Starting Aids
34(H49: PowerVent
ilt
PowerVentSwitchFeed
so
Engire Preheat Cab Switch FeecUor
Rdry Coil Fe€d
$l
Engine Preheat Indicator Lamp Feed
stA
Engine Pre'heat Time Relay lndicator
tamp Feed
3dl
Engine Pre'heat Glow Plug/FlameStart
Feed
36it
Engine GlorrtPlug Magnetic Switch
Feed
364
EnginePre-heatSolenoidCoil Feed
365
EnginePre-heatThermal Sensor Feed
366
EnginePre-heatSolenoidSwitch Feed
367
EnginePre-heatElementFeed
3674
EnginePre-heatElementFailureIndication to Time Relay
3678
Engine Pre-heatElementFailureIndication to Time Relay
PowerVentOPENCircuit
u2
PowerVentArmatureFeed
34it
Porer VentCLOSEDOrcra
35(F359: PowerWindow
350
Power Wndov Swihh Food
350L
Power WindorvSwihfi Fecd- L}l Sb
350R
PovverWindow Swibfi Fe€d - Rll SHo
351
Porer WindouYDOUVIICircd
352
Forer Whfu
Amilrc
35:!
Forcr Wnfu
UP Orcuit
354
furverWndow Su,ibh Feed to Power
Wndory Swibfl
355
fuirer WindorvSwitch Feed to Pourer
Window Swttch
Feed
368
EnginePre-heatTime Relay"lgnition"
Feed
368A
EnginePre-heatTime Relay€oil' Feed
369
EnginePre-heatOil PressureSwitch
Feed
3694
EnginePre-heatControllerFeed
37(H79: Cigar Lighter
16
370
CigarLighter/ Forer SupplyFeed
370A
Forer SupplyFeed
3708
Forer SupplyFeed
370C
BunkForverSupplyFeed
375A
SinkFeed
3758
SinkSwitchFeed
375C
SinkPumpFeed
Group37 Circuitand Wring Numbers
38F389: WindshieldWiper
ElectricWindshieldWiper Switch Feed
_LH
Specifications
40F409: Diagnosticsand Control
tOO
SAE J1708/1587Data Link (+)-*
&1
sAE J1708/15E7
Data.'n*,-]
4/Ji2
UnswitchedBattery Fusedto Datalink
403
EngineProgramming
Enable
4034
EOL EnableInstrumentCluster
&4
SAE Jl922 NoninvertedData Link (+)
405
SAE J1922 InvertedData Link (-)
tf06
SAE J1939 NonirvertedData Link (+)
CAN HIGH
/rc6A
SAE J1939 NoninvertedData Link (+)
CAN HIGH
406V
VORAD ECU - SAE J1939 Noninverted
Data Link (+) CAN HIGH
V/IOOA
VORAD FrontAntenna- SAE J1939
NoninvertedData Link (+) CAN HIGH
v4068
VORADDriverDisplay- SAE J1939
NoninvertedData Link (+) cAN HIGH
&7
SAE J1939 lnvertingData Link (-) CAN
LOW
381
ElectricWindshieldWiper Switch Fe€d
-RH
382
Low Speed ElectricWiper Motor
382A
Low Speed Wiper IntervalRelayto
Bulkhead
3&t
High Speed ElectricWper Motor
384
+12 Volt Supply Switchto Motor
385
Park ControlWiper Motor
385A
ParkControltoVECU
38sB
Park Controlto Switch
386
Supplyfrom Circuit Breakerto Switch
387
Switch Feedto WasherMotor
387A
WasherFluid Level Input to Instrument
Cluster
3878
WasherMotor 12V Supply
388
IntermittentWper
4{,7A
sAEJ1e3e
lnvertins
Daaunllcnru
389
lntermittent Wper Feed to Whor ControlModule
N t
VORAD ECU - SAE J1939 lrwe-t-rng
Data Link (+) cAN LOW
389A
IntermittentWiper RelayCoil Supply
YtlOTA
389B
IntermittentWiper RelayCoil Retum
VORADFrontAntenna- SAE Jl939 lnverting Data Link (+) CAN LOW
v{o7B
VORADDriverDisplay- SAE J1939 lnverting Data Link (+) CAN LOW
/rc8
SAE J1939Shield
39(H99: ElectricFuelPump
390
ElectricFuel Pump Switch Feed
408A
SAE J1939Shield
391
ElectricFuel Pump Starting Feed
tl08B
SAE J1939Shield
392
ElectricFuel Pump Feed
408V
VORADECU- SAE J1939Shield
a
17
Group37 Circuitand WiringNumbers
Spe<tficains
41H19: Back-upLamps
46F489: RearAxle
410 .u^
tl60
Selector Swibh Sdsty S\flibtt F€€d
tl61
Selector Switch Feed
62
FonrvardRear Axre sorerr*J \hhre Fo€d
46it
Rear Rear Axle Solenoid Vahrs Fe€d
&
Speedometer Adapter Feed
465
Rear Axle Solenoid Valve Feed
tt66
Differential Lock Safety Switch Feed
67
Differential Lock Solenoid Valve Feed
468
Fonrard Rear Axle Oil Temp Sending
Unit Feed
469
Rear Rear Axle Oil Temp SendingUnit
Feed
470
rwo (2) speed Axre
421
Uft Axte 12V Feed
47'!2
Lift Axle switch
4'na
Lift Axle switch #1
4728
Lift Axle Switch tf2
4Z2C
Lift Axte Switch #3
479
Lift Axte Sotenoid
4734
Lift Axle Solenoid#1
4738
Lift Axle Solenoid #2
473C
Lift Axle Solenoid #3
, a
\Ett
411
Back-Up Lamp Feed/Back-UpAarm
Feed
Bac*-Up Lamp switch Feed
420'-4,59:
Indicator lamps
42O
Parking Brake Indb&r lrmp' Faod
42OA
ParkingBrake Indicabrb \rECU
421
Parking Brake Pressure $,1$
422
Differential lodout IndcabrLsm
4224
Differential Lod@d ffi
Jumper Feed
tanp
4228
Ditbr€nt!il Lodoll Er
Feed (e,GrnJ b iluEfit
tamp
dusteO
423
Difieledbl l-&a
Swidt Fe€d
tamp
424
Fif0r wrnel ffi
424A
Fifth whool ffilamp
Fe€d
ffir
Feod
Fe€d
Ldnp Feed
Jumpe|
Fifth Wheel hbr
lamp Switch Feed
42dfet
-
Differentbl lofri
l.amp Feed
herwtreel Indicator
427
Ditbr€ntd lo&rn
Fe€d
hbrwheelSwitch
42ZA
Dif1".ntbl l_odorrt Intenrheel Forward
Rear Ade SwUr Feed
4278
Difrelerilid lodod Interwheel Rear
RearAde $,ibh Feed
427C
Difrarfihl l.od<out lntendreel Dash
Swibh Feod
428
Low Air Preosure Indicator Lamp Feed
4N
Frcnt Axb lodout Indicator lamp Feed
/t3O
PTO Indi:ator lamp Feed
/t31
Air Suspensbn Pressurelndicator
Lamp Feed
425
^.
J
18
l
-
Group 37 Circuitand Wring Numberc
Soecifications
49H99: Radio
,ARG e Pc &ago
o
o
Radio/ cB RadioFeed
RadioAccessoryFeed Pga1E(
50F549: Miscellaneous
lamps
5(x)
CourtesyDoor lamp SwttchFA*"
s(xlL
Door Switch Feed - LH Side f
Radio Battery Feed (Zrres*ey)
500R
Door Switch Feed - RH Side
493
Headlamp/MarkerLamp On Signal
501
Courtesy Door Lamp Feed
O QAlv G€
497L+
Door Speaker Left, Positive
501L
Door Lamp Feed - LH Side
d
4szL-
Door SpeakerLeft, Negative
5{r1R
Door Lamp Feed - RH Side
502
Roof Sign Ught Feed
503
CourtesyDoor tamp to Relay
504
CourtesyDoor Lamp RelayCoil Retum
so4L
Door Switch Relay Coil Return- LH
Side
504R
Door Switch Relay Coil Retum- RH
Side
505
Cab Overhead Lamp to Relay
5(}5A
Cab Overhead Lamp VN7/0
tt91
LgHT
CB Radio Power Stud Feed
6Qc"4t,
/etta
Smnll EttrcX4BzR+
Door SpeakerRight, Fositive
P rP PL E 4gZR-
Door SpeakerRight, Negative
(qql ,+ )
( +11 t -)
zl98LR+?Q?ta RearSpeaker,Left, Positive
498LR- 4?a t DRear Speaker,Left, Negative
(4 e1 R^+)
(4 q'7 Q )
498RR+u Q?PAg"^r Speaker,Right, positive
498RR-4?? Phgsarspeaker, Right, Negative
DAe\ 6Pc,c/ 4WLF+
Front Speaker, Left, Positive
smntr Ro d 4ggLFB L0 e
499RF+
Front Speaker, Left, Negative
d
HtT f
Front Speaker, Right Fc*title
499RF-
Front Speaker, Right, l,legdirrs
L+
Lower Left Rear, fusitiw
506
Bunk Overheadlamp to Switch
L.
Lorer left Rear, Negdive
g7
FluorescentLamo Swibh F{
R+
Lolver Right Rear, Fositive
56
Work Genter Fluorescent Lamp Feed
R-
Louer Right Rear, Negative
5OA
S1+
SubwooferCoil 1, Fositive
OverheadFluorescentlamp Switch
Feed
sl-
SubwooferCoil 1, Negative
509B
52+
SubwooferCnlal2,Positive
OverheadFluorescentlamp Switch
Feed
52-
SubwooferCoil2, Negative
510
Oleftead Fluorescent Lamp Feed
6,?aunt 1O A
Rd^t |llu*.*fu
GRe,,l /4 t R
p,.t.rt,.-*
(,ocor,
Bh,r66_
.Art&
F
a4n
fe"rr
4
"fe{'oP t
m/
Syty
fetl
oil fl't
fAg e Aee
/^)t/" //,qfn^t o ( n e l
,4 ft<a t"TARrer RoJ,'o . - P
3
19
55F599: EngineElectronics
ECU Common+5 Volt Outputto Farking BrakeSwitch
VehicleSpeedlnputto EECU
:.,
VehicleSpeedlnputto EECU
ECU Common+5 Volt Outrut to Power
Control
551
VehicleSpeedRetumfromEECU
551A
VehicleSpeedRetumtrornEECU
ECU Common+5 Volt to RemoteThrottle
552
ThrottleFositionSensorSr.pply
553
ThrottleFositionSonsorInputb EECU
554
ThrotdeFositionS".:r
555
ldle ValklatirnInptr b EEcu
s55A
ldle Valiijdin \GCU b EECU
556
Thrde Vlr5er
557
ECUCormr {51fr1 Onput
557A
ECUCormr {5 \,bf or&tn to Brake
Swihfl
557R
ECU Common+5 Voftto Fan Control
Override
557S
ECU Common+5 Volt to AC Status
558
ECU Common+12 Voft Output
558A
ECU Common+12 Vott Outputto Brake
Switch
5588
ECU Common+12 Volt Ouput to
Clutch Switch
558C
ECU Common+12 Voh OutrrJtto ldle /
DiagnosticSwitch
558D
ECU Common+12 Volt Ouput to
Cruise Control/PTOOn/Off Switch
558E
ECU Common+12 Voft Or.rtputto
Cruise Control/PTOSeUResumeSwitch
Swihfl
558F
ECU Common+12 Volt Outputto Engine BrakeOn/Off Input
ECUCornsr +5 \blt Outrut to ldle /
DhgnosficSlnctl
5s8G
ECU Common+12 Volt Outputto DiagnosticTest Input
557D
ECUCorrrur +5 VoltOutrrrtto Cruise
ConroUPfO Or/Off Switch
558H
ECU Common+12 Volt Outputto ldle
ValidationSwitch
557E
ECUGqrmon +5 VoltOutputto Cruise
Contou PIO SeUResume
Switch
55&J
ECU Common+12 Voh Ouput to Remote PTO
557F
ECUCommon+5 VoltOutrutto Engine
BrakeOrVOffInput
558K
ECU Common+12 Volt Outrut to Throtde Fosition Sensor
558L
557G
ECUCommon+5 VoltOutputto DiagnosticTestInput
ECU Common+12 Volt Ouprn to
Coolant Level Sensor
s58M
EGUCommon+5 VottOutputto ldle
ValkjationSwitch
ECU Common+12 Volt Outrut to Farking Brake Switch
5s8N
ECUCommon+5 VoltOntputto RemotePTO
ECU Common+12 Voft Ouput to
Power Control
558P
ECU Common+12 Volt to Remote
Throttle
s57K
EGUCommon+5 VoltOutputto Throttle PositionSensor
558R
ECU Common+12 Volt to Fan Control
Ovenide
557L
ECUCommon+5 VoltOuput to
CoolantLevelSender
558S
ECU Common+12 Volt Outputto AC
Status
5578
---
hgu b EECU
ECUCorrrur +5 \blt Outrut to Clutch
,^
sa-
557H
5s7J
20
Reifil
Specifications
Group 37 Circuitand Wring Numberc
559
ECU Common Ground
559A
ECU Common Groundto Brake Switch
5598
ECU Common Groundto Clutch Switch
559C
ECU CommonGroundto
ldle/DiagnosticSwitch
559D
ECU CommonGroundto Cruise
ControYPTOOn/Off Switch
559E
ECU CommonGroundto Cruise
Control/PTOSeVResumeSwitch
561
ldle/Dhgnctic SwitchDecrementInput
tOEECU
562
CruiseControUPTO
Sv'it"hlO
5624
Cruise Control On Inputto VECU
563
Cruise ControUPTOSwitch Set ON
Inputto EECU
56itA
Cruise ControYPTOSet (+)
D563
EatonTop 2 LockoutSolenoid
EEcu
559F
ECU CommonGroundto Engine Brake
On/Off lnput
5g
GruiseControl/PTOSwitch Set OFF
lnputto EECU
s59G
ECU Common Groundto Diagnostic
Test lnput
564A
Cruise Control/PTOSet G)
c564
lcon lndicatorl-amp
559H
ECU CommonGroundto ldle Validation
Switch
D5il
Opt. ldle IndicatorLamp
559J
ECU CommonGroundto Remote PTO
565
Cruise ControUPTOSwitch ResumeON
Inputto EECU
559K
ECU Common Grcund to ThroitdeFosition Sensor
565A
Cruise ControUPTOResume
559L
ECU Common Grcund b Coolant Level
Sender
D565
EatonTop 2 Shift Solenoid
566
Cruise ControUPTOSwitch Resume
567
:::il"#h,npu,.o
567A
Service Brake Switch Input to EECU
5678
Service Brake Switch Input to EECU
568
Service Brake SwitchON to Clutch
Switch NC Terminal
569
Service Brake Switch OFF to Clutch
Swibh CommonTerminal
570
Not Used
571
Clutch Switch lnput to EECU
572
Engine Brake SwitchON to EECU
573
RemotePTO SwitchON to EECU
573A
RemotePTO 1 Enable
5738
RemotePTO 2 Enable
559M
ECU Common Grcund b Parking Brake
Switch
559N
ECU Common Ground to ForuerConEol
559P
ECU CommonGroundto Remote
Throttle
559R
ECU CommonGroundto Fan Control
Override
559S
ECU Common Groundto AC Status
559X
ECU Common Retum 1 (lSl!l/lSX)
559Y
ECU Common Return2 (lSM/lSX)
s592
Cab Return (lSM/lSX)
560
ldle/DiagnosticSwitch Incrementlnput
to EECU
56OAA
ldle/DiagnosticSwitch lncrementInput
to EECU (lSl\r/!SX)
560A
DiagnosticEnableto EECU (lSM/lSX)
573C
RemotePTO 3 Enable
560B
DiagnosticSwitch On Indicator
574
DiagnosticRequesUEngine
Shutdown
Ovenide to EECU
o
21
Specifications
Group37 Circuitand WiringNumbers
57s
Stop Engine lndicatorLamp
576 ''
m. Af
5lrA-lv
Check Engine IndicatorLamp
Engine ProtectionSystem Indicator
Lamp
594A
On/Off Manual Fan Enable Switch to
ECU
505
Engine ShtttdournSignal
596
Battery Event Recod€r
578
Cruise Control IndicatorLamp
597
ECU Common+12V Onput
578A
Cruise Control Relay Ground(lSX)
508A
lcon AmbientAir TempSensor Supply
579
Engine Brake Enablefrom EECU
s98B
lcon AmbientAir TempSensor Retum
s80
Cruise Control/PTOSwitcfi Resume ON
to Diagnostic Request Switcfl
581
ParkingBrake Switch Inputb EECU
60(H39: EngineGontrols
EngineGovernorSolenoidVafueFeed
Parking Brake Swihfi Input b Time Relay
6m
5818
601
EngineGovernorPressureSwitch Feed
602
EngineChoke SolenoidFeed
603
EngineChoke Push Switch Feed
581C
Parking Brake Swihh Fo€d
#2
Auxiliary Shrfiorn
58:l
PorverContol lrqn EECU
604
EngineControl Relay Feed
584
EECU Sensor ReUm
604A
Speed Limiter EngineShutdorn Signal
584A
EECU Sensor Retrm from Throttle Fosition Sensor
605
EngineControl RelaySwitch Feed
EECU Sensor Rdrm from Remote PTO
6054
IGNITIONSignal ConverterFeed
5848
58+so4
Cruise ContsolSu,ihh to Cruise Control
BrakeSwibtt CommonTerminal
6058
IGNITIONSpeed LimiterFeed from Sig
nal Converter
586
Cruise Contol Service Brake Switch
Fe€d
606
EngineControl Relay PressureSwitch
Feed
587
Cruise Confol Service Brake Switch
ON Feed
607
EngineShutdorn System Feed
608
Alarmstatto PressurestatFeed Jumper
608A
AlarmstaVHighWaterTemp Warning
Signal
\v
lrpd to EECU
588
Remde PTO Sensor Input to EECU
589
Low Goolant Level InPutto EECU
590
RemotePTO Sensor InPutto RelaY
609
Waming Lamp and Buzzer Feed
591
Data Display Battery Feed
610
592
Engine Switched Battery Feed
Engine RadiatorLow Coolant Probe
Feed
592A
EECU A Supply (Volvo)
610A
5928
EECU B Supply (Volvo)
Low Coolant Indicator and Alarm Feed
Alarmstat"NormallyClosed"Terminal
s92V
VORADFused lgnition
593
DiagnosticIndicatorLamp
594
Or/Off Fan Enablefrom EECU
22
611
Feed
611A
AlarmstaUHighWaterTemp Time Relay
SignalGround
612
Alarm High TempWarning Feed
Glotp 37 Orcuit and ttUtiU Nrrr5ers
Soec{ir:atirrs
613
Alarm LovyOilSwitch Feed
632
OilTemp lanp Fe€d
614
High CoolantTempSwitch- Warning
633
Oif TempSwihh Fe€d
615
High CoolantTempSwitch - Shutdown
Low Oil PressureSwitch "shutdown'
(NormallyOpenGround)
634
),
Solenoid Valve to Throtde SwN-/eeO
Gt5
EngineBrake Mode SelectSwitch Feed
635A
EngineBrake Switch Lamp Feed
616
617
Low Oil PressureSwitch Warning (NormallyClosedGroundReturn)
618
Low Oil IndicatorLamp Ground Return
619
o
o
Cummins/Caterpillar
EngineCoolant Level Low Signalto EECU
Detroit Diesel Engine- Coolant
LevelLow Signalto EECU
6358
EngineBrake Switch Lamp Feed
(rsM/tsx)
636
Brake Feecl/SkinnerValve-Exhaust
Switch Feed
6it6A
Circuit BreakerEngine BrakeExhaust
Switch Feed
G}68
CircuitBreakerAir PressureSwitch and
SkinnerValve Feed
636C
Engine PreheatTime Relayto Exhaust
BrakeSolenoid/EngineBrakeSwitch
6it6D
PTO Feedto Engine PreheatTime
Relay
620
Cummins/Caterpillar
Engine- Coolant
Level NormalSignalto EECU
621
Coolant LevelModule Feed
624
EngineBrakeOn/OffSwitch Feed
625
Clutch Switch Feed
626
Ctutch Switch to Throtde Swilch Feed
6it6E
ExhaustBrakeThrotfle Switch Feed
627
Throtile Swttch to Mode S€l€ct Switch
Feed
G}6F
ExhaustBrake Select Switch Feed
628
Engine Brake "LcnrrfFeed
6it6G
ExhaustBrakeCtutch Switch
6il6H
GovernorSwitch Feed
6ilc,
EngineBrake Control ModuleFower
Feed
636K
ExhaustBac* PressureGovernorSolenoid Valve Feed
6il7
TransmissionLockupSwitch Feed
6:t8
Clutch Switch to SolenoidValve
6il9
PTO SolenoidValve Feed
639A
PTO Switch 12V Supply
6398
PTO Switch lndicatorLamp Feed
639C
PTO Switch 12V Suppty
639D
PTO Switch 12V to Sotenoid
6:t9E
PTO Switch 12V Supply
dlgF
PTO Switch lndicatorLamp Feed
6if9G
PTO Switch 12V Suppty
628A
6288
o
o
Engine BrakeOO1(tSX)
Engine Brake Switc*rJumper (Volvo
D7, D12l
o
o
EngineBrake010 (tSX)
Engine BrakeSignatto EECU
(VolvoD7, D12l
628C
EngineBrake100 (tSX)
628D
EngineBrake01 (lSM)
628E
EngineBrake10 (tSM)
Engine Brake"Medium"Feed
629
629A
Fonrard EngineCylinderBank Engine
Brake Feed- 3 PositionBrake
6298
Rear EngineCylinderBank Engine
Brake Feed- 3 PositionBrake
630
EngineBrake Mode Selectto Transmission LockupSwitch Feed
6il1
U,
\=-
Lockup Switch to Throttle Switch Feed
a_
23
vu
68(H99: Air ConditioningControl
70F709: HeatedMirrors
zx)
LorvHeat (Black)ElementFeed
Low RefrigerantPressureSwitch Re'
turn Low Side
701
High Heat (Red) ElementFeed
7t2
HeatedMinor IndicatorLamp Feed
High RefrigerantPressureSwitcft Return High Side
7t2A
HeatedMinor Feed
703
HeatedMinor Switch Feed
682
High RefrigerantPresgrre Su,idt Fo€d
(Fan Control)
7U
Minor Switch Fower Feed
704lL
Minor Control- LH Side
682A
Fan Clutch SolenoidRdrm
704iR
Minor Control- RH Side
6828
Signal Out from Data Concenfralor
705
Minor Motor CommonFeed
682C
Feed from APADSltiodde b Data
Concentrator
705L
705R
Minor Motor CommonFeed- LH Side
Minor Motor CommonFeed- RH Side
682G
A/C High Pressun Signd b VECU
706
Minor Motor Up or Down Feed
68il
High Refriprant Preesr.rreSwitch Return (Fan Cortol)
706L
684
OrVOffFan Sdgx*l
Feed
Minor Motor Up or Down Feed- LH
Side
Mirror Motor Up or Down Feed- RH
Side
707
Mirror Motor Left or Right Feed
685
On/Oft Fan Sobn<*J Orcnide Switch
Retum
707L
686
Bunk Tenp Confrol Switch SuPPIY
707R
Mirror Motor Left or Right Feed- LH
Side
Minor Motor Left or Right Feed- RH
Side
I-
orlenide Switch
00,R-
Bunk Terp Ccrfol Switch Signal
688
Bunk Terp Conrol Switch Return
689
Nd us€d
690
^^<-
706R
7 1 r ^ 7 1 9Door
= Locks
710
Battery Feed to Door Lock Module
Deftost $nibh Fe€d
711
Door Lock Moduleto Left-HandSwitch
691
Deftost Su,ibh Return
712
692
Low Reftigerant Pressure Switch Feed
Lil Sade(A/C CompressorClutch
conrol)
Door Lock Moduleto Right-HandSwitch
Door Lock Moduleto Motor - Unlock
High RefrigerantPressureSwitch Feed
High Side (A/C ComPressorClutch
Control)
69:l
Low RefrigerantPressureSwitch Re'
turn - Low Side (A/C Compressor
GlutchControl)
694
695
Lou RefrigerantPressureSwitch Return - High Side (A/C Compressor
ClutchControl)
6954
Auto A/C Or/Off Switch Feed
ATCTemp.Sensor Return
--lf-,
itgYt
698
24
----'
ATCTemp.Sensor Return
ATCTemp.Sensor Feed
713
713L
713R
714
714L
714R
Door Lock Moduleto Motor - Unlock
LH Side
Door Lock Moduleto Motor - Unlock
RH Side
Door Lock Moduleto Motor - Lock
Door Lock Module to Motor - Lock LH
Side
Door Lock Moduleto Motor - Lock RH
Side
720-729:Safety and Warning Sys-
tems
720
SRS Warning Lamp Feed
721
SRS Airbag Feed
72,
Smoke Detectorlgnition Feed
78
Smoke DetectorDisableSignal
Group 37 Circuitand Wrinq Numberc
Specifications
73(F799: Anti-lock(ABS)Control
Tt4
Traction C.ontrollamp
Left
T74A
TractionC;ontrotLamp,WAB{{-'
T748
TractionControl Lamp, Bendi*.-
775
Engine Brake DsaHe
776
ABS ECU +12 Volt Battery Fuse Feed
7n
ABS ECU +12 Vott lgnition Feed
TNA
ABS ECU +12 Voh lgnitionFeed
7nB
Tnc
ABS ECU +12 Voh lgnitionFeed
ABS ECU +12 Volt lgnitionFeed
778
ABS WarningLamp Enable
779
ABS Warning Lamp- Tractor
T79A
ABS WarningLamp - Trailer
7n
TractionControl SolenoidFeed
781
TractionControl SolenoidGround
T101
LH Front Lining Wear SensorGround
730
Left FrontSensorSignal
731
Left FrontSensor Return
732
Left FrontModulatorExhaust
733
Left FrontModulatorHold
7g
Left Front ModulatorCommon
735
Left Mid Sensor Signal
736
Left Mid Sensor Return
737
Left Rear SensorSignal
738
Left Rear Sensor Return
739
Left Rear ModulatorExhaust
740
Left Rear ModulatorHold
741
Left Rear ModulatorCommon
Right
750
Right Front Sensor Sigtal
T1t2
LH Front Lining Wear SensorSignal
751
Right FrontSensor Retum
T1G?
LH Front Uning Wear SensorSupply 5
752
Right FrontModuhtor Exhaust
753
Right FrontModulatorHold
T104
:h*
754
Right FrontModulatorCommon
Tl(F
RH FrontLining Wear SensorSignal
755
Right Mid SensorSignal
T1(b
RH Front Lining Wear SensorSupply 5
Vohs
756
RightMid SensorReturn
T107
757
Right Rear SensorSignal
FrontAxle PressureControlValve
Ground
758
Right Rear Sensor Return
T108
759
Right Rear ModulatorExhaust
FrontAxle PressureControlValveSupply 12 Volts
760
Right Rear ModulatorHold
T109
FrontAxle PressureControlValveCAN
HIGH
761
Right Rear ModulatorCommon
T110
770
Engine Brake InterruptRelay- Common
FrontAxle PressureControlValveCAN
LOW
T111
7:71
Engine Brake Intenupt Relay- NC
Service BrakeValveSensorCommon
Ground
772
Engine Brake InterruptRelayfrom ABS
ECU
T112
Service Brake ValveSensorSupply 5
Vofts
TractionControl Enable
T113
Service BrakeValveSensorSignal #1
Lining
wears"n*r)^0
25
Group37 Circuitand Wring Numbers
T114
"D
Service Brake ValveSensorSignal#2
T116
Rear Axle Pressure Contrcl VahreSuf
ply 12 Vohs
Rear Axle PressureControlVafue
Ground
Specifications
8fi!€50: AutomaticTransmission
800
Automatic/ElectronicTransmission
grl
lgniticn Feedto VehicleInterfaceModule
w2
Automatic TransmissionFeed
8(xt
PTO Switch to TransmissionECU
T117
Rear Axle Pressure Confol VahreCAN
HIGH
804
PTO Relay Common Feed
T118
Rear Axle Pressure Confol VahreCAN
LOW
805
PTO Relay NormallyOpen Feed
T119
Trailer Pressure Contol \laha Gound
806
ABS Relay NormallyOpen Feed
T120
Trailer Pressure Cormol \hhle Supply
12 Volts
n7
ABS Relay Common Feed
808
PTO Relay NormallyClo.s6dFeed
T121
Trailer Prcssure Cortol Valve GAN
HIGH
atg
Oil PressureSwitch Feed
T12,
Trailer Ppssrrs Cmtd VatueCAN
LOW
810
Oil PressureSwitchto Transmission
ECU / Check TransmissionRelay
T1zts
LH Rear Bre Lifrg Wear Sensor
Common Grqnd
811
TransmissionFilter IndicatorLamp
T124
LH R€ar{lU Brlalo Uning Wear Sensor Signal
812
TransmissionFilter Switch
813
TransmissionControl RPM Sensor
Signal
LH Rear-Rear Brake Lining Wear Sensor Siignal
814
TransmissionControl RPM Sensor
Return
LH Rear Brlalo Uning Wear Sensor
Supply 5 \rbis
815
AutoshiftTransmission- EPL (+)
816
AutoshiftTransmission- EPL G)
817
AutoshiftTransmission- EPL Shield
818
TransmissionGround- AutoshiftOnly
819
TransmissionGround- AutoshiftOnly
820
Clock (+) - AutoshiftDisplay
821
Data (-) - AutoshiftDisplay
822,
DisplayGround- AutoshiftDisplay
88
Transmissionin NeutralSignalfrom Autoshift TransmissionECU
rll]
T126
T127
T128
T1Z9
RH Rear Bnke Uning Wear Sensor
Common Grcund
RH Roar{,lad Brake LiningWear Sensor Siignal
RH Rear-Rear BrakeLiningWear Sensor Siignal
T130
RH Rear Brake Uning Wear Sensor
Supply 5 Volts
T131
EBS Load SensorGround
T132
EBS Load SensorSignal
T13it
EBS Load SensorSupply 5 Volts
850
PTO RPM
T134
EBS ECU LorvAir PressureSensor
Feed
851
PTO Switch "ON"
852
PTO Pump Solenoid
853
PTO Overspeedlndicator
854
PTO PressureSwitch
,rs
26
EBS ECU LovrtAir PressureSensor
Signal
Group37 CircuitandWring Numberc
Specifications
A101
N Solenoid, Lort
A136A
Batery Foupr
A1(}2
A,DJSolenoidFower
A1365
A103
C Solenoid,Low
A137
::::,ffi".,F.,.'.
Al04
G Solenoid,Low
A1(F
GeneralPurposeOutpnt5 (-)
A107
F SolenoidPower(F-Hl)
A110
F Solenoid Lorrtt
4112
GeneralPurposeOutput3 (+)
A113
A138
RetarderTemp Sensor Input
A139
OutputSpeed - HIGH
A14'
TurbineSpeed - LOW
A14OA
TurbineSpeed - LOW
A141
EngineSpeed- HIGH
4142
- HIGH
SerialCommonlnterfiace
ReverseWarning(-)
A1/t3
BatteryGround
A114
GeneralPurposeOutput 1 H
A146
lgnitionSense
A115
CheckTransmission(-)
4147
SumpTemplnput
A116A
H, N SolenoidPower(H, N Hl)
A148
Outprlt Speed - LOW
4117
GeneralPurposeInput 8 H
A149
TurbineSpeed- HIGH
4118
General PurposeInput3 (+)
4149A
TurbineSpeed- HIGH
A119
GeneralPurpose lnpd 4 (+)
A150
EngineSpeed- LOW
A151
SerialCommon lnterface- LOW
4120
A Solenoid Lort
A1$3
GeneralPurposelnput 2 (-)
4121
B, E SolencxiJForer
4155
GeneralPurposeInput 1 (-)
A1z3
Neutral Start (+)
A157
VehicleSpeed
4124
Sensor Forer
A161
DigitalGround(GPl)
A1244
Sensor Poryer
4162
C3PS Input
A12s
General PurposeOutpd 4 (-)
4163
GeneralPurposeOutput6 (-)
4127
H SolenoidLovv
4164
Retader ModulationRequest
A128
B Solenoidlow
A165
Oil LevelSensorlnput
A129
E Solenoid Low
4166
GeneralPurposeOutrut H
A130
C, G Solenoid Power
4167
General Purpose Output 6 (-)
A169
GeneralPurposeInput (-)
4131
D SolenoidLow
A170
PrimaryShift Selector1
4132
General PurposeOrrtput2 H
4171
PrimaryShift Selector2
A135
Analog Ground
4172
PrimaryShift Selector4
A1354
Analog Ground
4173
PrimaryShift SebAor 8
A136
Battery Power
4174
PrimaryShift Seleaor P
27
Grotrp 37 Circuit and Wring NurSers
$eft*rr
A17s
Alzh
shifiselectirodeInput
General
Purpose
orrtpd6 (-)
95(H59: PrOteCted "Bfanch COf
neGtOf" GifCUit FeedS
A1D
Generatpurpose trp11 10 (-)
gto
CommunicationSys{em- Battery Feed
A178
GeneralPurpooelryd lf (+)
951
CommunicationSystem- lgnition Feed
A18o
shift sel€ctor Di+lay
952
Air Drier Feed- Relayto Heater
A186
Ground
A1g7
Ground
9Sg
Fuel Heater Feed_ Relayto Heater
Algg
Ground
9S4
Fuel Heater_ Relay power Feed
A195
TransmissinnlD
955
A325CM
Retarder Fqrer neray por|Ur)
AccessoryCircuit BreakerFeedto
Branch connector
A325NC
RetarderFolrer neUV p511y '
Closed)
956
lgnitionCircuit BreakerFeedto Branch
Connector
957
goFglO: Detrolt uelol Feeds
BatteryCircuit BreakerFeedto Branch
connector
D888
q'l
ProDriverAhD (lfDrf
958
CumminsICON ThermostatData
Pneumdb catH
Lil Fo€d
D958
optimized tdte ThermostatInput
902
Pneumdic Coil
ljnit Deflate
903
Pneumdb Cat|ol unit Drive
904
Pneumdbcoru unitsteersotenoid
97(F979:
Fe€d
Inveftgf
9SA
Ground lN 12ov
,O5l
Pneumdb Cffil
9SB
GroundOUT 12OV
906-
PneumatbCffid UnitTrailerSolenoid
Fo€d
96A
NeutrallN
907
ECU SemrTransducer Signal
968
NeutralOUT
908
ECU Transdpr
9ZA
9OgA
12OVAC tN
Cumn*r l@N Alarm
9o9B
Cumn*rs ICONAtarm Return
978
120V Ac our
D9O9
OOinaO Hb Alarm Outrut
971
lrwerter Remote Control Feed
910
Cummirs ICON ECU Common
g'n
lnverterRemoteControl Return
910A
cummins lcoN start signal
973
LED common cathode
9108
CumminsICON Safety Loop Feed
D91o
optimized tdle start Retayoutput
974
Ac lN LED
D91OA
Optimizedldle Start Supply
975
lnverteron LED
Unit ForverSupply
Voltage Reference
28
---1
Group37 Circuitand WiringNumbers
Specifications
990-999:AuxiliaryCircuits
AUX
lgnitionRelay Feedfrom Maxi Fuse to
Trailer
AUXA
AuxiliarySwitch 12V Feed
EXPB1-1
ExpansionBlock Feed
EXPB1-2
ExpansionBlock Feed
EXPBl.€
ExpansionBlock Feed
EXPB1-4
ExpansionBlock Feed
EXPB1-5
ExpansionBlock Feed
EXPBl4
ExpansionBlock Feed
EXPB2-1
ExpansionBlock Feed
EXPB2-2
ExpansionBlock Feed
EXPB2.3
ExpansionBlock Feed
EXPB2-4
ExpansionBlock Feed
990
OvercrankProtection(OCP) Battery
Power
991
Fuel Cooler Fan Feed
992
Fuel CoolerTemperatureSignal
999
AuxiliarySwitch llluminationFeed
9994
EngineAuxiliaryPass-throughCircuit
9998
EngineAuxiliaryPass-throughCircuit
999C
EngineAuxiliaryPass-throughCircuit
999D
EngineAuxiliaryPass-throughCircuit
999E
ChassisAuxiliaryPass-throughCircuit
999F
ChassisAuxiliaryPass-throughCircuit
999G
ChassisAuxiliaryPass-throughCircuit
29
Feedback
One of our objectives is that workshop perconnel should have access to correct and
appropriate service manuals where it concerns fault tracing, rcpairs and maintenance
of Volvo trucks.
In order to maintain the high standads of our literature, your opinions and experience
when using this manualwould be grcatly appreciated.
lf you have any comments or suggestions, make a copy of this page' write dmn your
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listed below.
To
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D,ept.516 Service Publications
7825 National Service Road
P.O.Box 26115
Greensboro, NC 27ll(}26115
usA
Fax (336) 39il€170
Comments/proposals
ConcernsSerice Manual:
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