Volvo FH User manual

Service Manual
Trucks
Group 37
Wiring diagram
FH, NH
TSP128319

Foreword
The descriptions and service procedures contained in this manual are based on de-
signs and methods studies carried out up to November 1998.
The products are under continuous development. Vehicles and components produced
after the above date may therefore have different specifications and repair methods.
When this is judged to have a significant bearing on this manual, supplementary ser-
vice bulletins will be issued to cover the changes.
The new edition of this manual will update the changes.
In service procedures where the title incorporates an operation number, this is a refer-
ence to V.S.T. (Volvo Standard Times).
Service procedures which do not include an operation number in the title are for gen-
eral information and no reference is made to V.S.T.
The following levels of observations, cautions and warnings are used in this Service
Documentation:
Note: Indicates a situation, handling or circumstance which should be observed.
Important: Indicates a situation, handling or circumstance which should be empha-
sized so as not to lead to personal injury or damage to property.
Caution: Indicates a potentially hazardous situation which, if not avoided, may result in
minor or moderate injury or damage to property.
Warning: Indicates a potentially hazardous situation which, if not avoided, could result
in death, serious injury or major damage to property.
Danger: Indicates an imminently hazardous situation which, if not avoided, will result in
death or serious injury.
Volvo do Brasil Veículos Ltda
Curitiba, Brazil
Order number: TSP128319
© 1998 Volvo do Brasil Veículos Ltda, Curitiba, Brazil
All rights reserved. No part of this publication may be reproduced, stored in
retrieval system, or transmitted in any forms by any means, electronic, me-
chanical, photocopying, recording or otherwise, without the prior written
permission of Volvo do Brasil Veículos Ltda.

Contents
Example of wiring diagram ................................................................... 2
Examples of symbols on wiring diagram ........................................... 3
Component wiring diagram index ....................................................... 6
Component wiring diagrams ................................................................ 8
Illustrations index ................................................................................ 48
Illustrations ........................................................................................... 49
Circuit card electrical centre .............................................................. 85
Fuses on circuit card electrical centre ............................................. 86
Relays on circuit card electrical centre ............................................ 88
Cable harness illustration index ........................................................ 89
List of connectors ............................................................................... 92
List of components ............................................................................. 98
Abbreviations ..................................................................................... 104
Cable colour code ............................................................................. 105
Feedback
1

Group 37 Wiring diagram FH, NH Example of wiring diagram
Example of wiring diagram
Refer to the list of contents for the designation of the
wiring diagram.
If the wiring diagram designation is boxed in with bro-
ken lines this means that the wiring diagram is not
standard on all market or vehicle models.
Seek column.
30 Voltage battery, kl.30.
15 Voltage with starting key in drive position, kl.15.
61 Voltage when alternator charges, kl.61.
Reference arrow (for circuit diagram EA, seek column
13).
Switch, comp. no. (104).
Single lines, cables.
Relay, comp. no. (303).
Cable area and colour (0.75 mm2, blue).
Connector (CLA terminal 4).
Bulb, comp. no. (403)
A broken line box round the component number
shows that the component is not standard on all mar-
kets or vehicle models.
If the line is broken this means the cable is not stan-
dard on all markets or vehicle model.
Earth connection point no: 2. and earth terminal no: 4.
(see diagram Earth Connections).
T3009608
Joint sleeve.
2

Group 37 Wiring diagram FH, NH Examples of symbols on wiring diagram
Examples of symbols on wiring diagram
Battery
Connector
Junktion
Fuse
Joint sleeve
Cable
Twisted cables
Conductor on circuit card
Earth connection and cable
Switch
Switch, starting switch
Closing contact
Closing contact, pressure-regulated
Break contact, temperature-regulated
Thermostat, time-regulated
Slip contact, horn
3

Group 37 Wiring diagram FH, NH Examples of symbols on wiring diagram
Relay
Relay with internal circuit diagram
Bulb
Bulb, full beams and dipped beams
Bulb, tail light
Alternator
Starter motor
Washer motor
Windscreen wiper motor
Solenoid valve with diode
Pressure sensor
Temperature sensor
Level sensor
4

Group 37 Wiring diagram FH, NH Examples of symbols on wiring diagram
Starting heater
Cigarette lighter
Horn
Rheostat
Buzzer
Loudspeaker
5

Group 37 Wiring diagram FH, NH Component wiring diagram index
Component wiring diagram index
AA Power supply, starting system, immobiliser .................................................................... page 8
AC Vehicle ECU .................................................................................................................... page 9
BL Engine ECU, fuel injection system, preheating, FH12 .................................................... page 10
CE Head light, parking light, marker light, DRL ................................................................... page 11
CG Fog light, rear fog light .................................................................................................... page 12
CH Spot light (STD) DRIVL2 ................................................................................................. page 12
CI Spot light (EU) DRIVL2EC .............................................................................................. page 12
CK Brake light ........................................................................................................................ page 13
CL Trailer controlled exhaust brake ...................................................................................... page 13
CN Direction indicator, hazard warning light ......................................................................... page 14
EA Reversing light, reversing warning alarm ........................................................................ page 14
ED Loading light, fifth wheel light .......................................................................................... page 15
EJ Roof sign light, L1H1/L2H1 ............................................................................................. page 15
EK Roof sign light, L2H2 ....................................................................................................... page 16
EN Beacon warning light ....................................................................................................... page 16
ER Interior light, L1H1/ L2H1, alarm clock/timer .................................................................. page 17
ES Interior light, L2H2, alarm clock/timer ............................................................................. page 18
EV Cigarette lighter ............................................................................................................... page 19
EX 12 V power supply ........................................................................................................... page 19
FA Horn ................................................................................................................................. page 19
GA Wiper, washer .................................................................................................................. page 20
HA Climate unit ..................................................................................................................... page 21
HB Cab heater, EBERSPÄCHER D1LCC, PH-CAB ............................................................. page 22
HC Cab and engine heater, WEBASTO THERMO 90, PH-ENGCA .................................... page 23
HE Electrically heated and adjusted seat ............................................................................. page 24
HG Electrically heated mirrors ............................................................................................... page 24
HH Electrically operated mirrors ............................................................................................ page 25
HK Air dryer ........................................................................................................................... page 25
HM Fuel filter heater .............................................................................................................. page 25
HO Water separator heater ................................................................................................... page 25
HP Electrically cab tilt .......................................................................................................... page 26
JA Radio ............................................................................................................................... page 26
KA Electrically operated window winders ............................................................................. page 27
6

Group 37 Wiring diagram FH, NH Component wiring diagram index
KB Electrically sunroof .......................................................................................................... page 27
KE SRS, airbag ..................................................................................................................... page 28
KH Central door lock ............................................................................................................. page 28
LD Power take-off .................................................................................................................. page 28
LE Double power take-off ..................................................................................................... page 29
LG Differential lock ................................................................................................................ page 29
LJ Bogie lift, tag axle lock, RADT-LA ................................................................................... page 30
LL Tag axle lock, RADT-A6S ................................................................................................ page 30
MA Bogie lift hydraulic, RADT-AR ......................................................................................... page 31
MD Bogie lift hydraulic, with axle load limiter, RADT-AR ...................................................... page 32
ME Air suspension, 6x2/6x4/8x2/8x4, SUSPL-EC ................................................................ page 33
MF Air suspension, 4x2, SUSPL-EC ..................................................................................... page 34
MG Rear air suspension, 4x2, TRACTOR, SUSPL-EC ......................................................... page 35
NA Instrument LHS module .................................................................................................. page 36
NB Instrument central module with tachograph .................................................................... page 37
NC Instrument RHS module .................................................................................................. page 38
NZ Instrument central module without tachograph ............................................................... page 39
OA Basic ABS, D-version ...................................................................................................... page 40
OB ABS/ASR, D-version ........................................................................................................ page 41
PA Headlight level control ..................................................................................................... page 42
TA Refrigerator ...................................................................................................................... page 42
TB Central lubrication system ............................................................................................... page 42
XA Extra fuses, key switch relay ........................................................................................... page 43
ZA Earth connections ........................................................................................................... page 44
ZB Earth connections ........................................................................................................... page 45
ZD ADR battery main switch, current limiter ........................................................................ page 46
ZE Air heater EBERSPÄCHER TMD, ADR-FRA .................................................................. page 47
7

Group 37 Wiring diagram FH, NH Component wiring diagrams
Component wiring diagrams
T3010019
8