Volvo FH12, FH16 LHD Wiring Diagram

Service Manual

Trucks

Group 37

Wiring diagram

FH12, FH16 LHD

FH12/FH16: 254453–

TSP23708/1

Foreword

The descriptions and service procedures contained in this manual are based on designs and methods studies carried out up to March 96.

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 service 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

reference to V.S.T. (Volvo Standard Times). Service procedures which do not include an operation number in the title are for general

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 procedure, practice, or condition that mustbe followed in order to have

the vehicle or component function in the manner intended.

Caution: Indicates an unsafe practice where damage to the product could occur. Warning: Indicates an unsafe practice where personal injury or severe damage to the

product could occur.

Danger: Indicates an unsafe practice where serious personal injury or death couldoccur.

Volvo Truck Corporation

Göteborg, Sweden

Order number: TSP23708/1

All rights reserved. No part of this publication may be reproduced, stored in retrieval system, or transmitted in any forms by any means, electronic, mechanical, photocopying, recording or otherwise, without the prior written permission of Volvo Truck Corporation.

ENG01855

Contents

Component wiring diagram index ........................................................ 2

Component wiring diagrams ................................................................ 4

Illustrations index ................................................................................ 52

Illustrations ........................................................................................... 53

Circuit board (32) electrical centre ................................................... 108

Fuses on circuit board (32) electrical centre ................................... 110

Relays on circuit board (32) electrical centre .................................. 111

Cable harness illustration index ....................................................... 112

List of connectors .............................................................................. 115

List of components ............................................................................ 121

Abbreviations ..................................................................................... 128

Cable colour code .............................................................................. 129

Feedback

Group 37 Wiring diagram Component wiring diagram index

Component wiring diagram index

AA BL BN CE CG CH CI CK CL CN EA ED EJ EK ER ES EV EX FA GA HA HB HC HD HG HH HK HM HP JA KA KB KE KG KH LD

Starter system, engine preheating .................................................................................

Ul, exhaust brake, exhaust pressure governor (FH12) ....................................................

EDC, exhaust brake, exhaust pressure governor (FH16) ................................................

Head light, parking light,marker light, DRL .....................................................................

Foglight, rear fog light ......................................................................................................

Spotlight (STD) ................................................................................................................

Spotlight (EU) ..................................................................................................................

Brake light ........................................................................................................................

Trailer controlled exhaust brake .......................................................................................

Direction indicator, hazard warning light ..........................................................................

Reversing light, reversing warning ...................................................................................

Loading light, fifth wheel light ..........................................................................................

Roof sign light (L1H1/L2H1) ............................................................................................

Roof sign light (L2H2) ......................................................................................................

Interior light (L1H1/ L2H1) ...............................................................................................

Interior light (L2H2/ L2H3) ...............................................................................................

Cigarette lighter ...............................................................................................................

12 V outlet in cab .............................................................................................................

Horn .................................................................................................................................

Windscreen wipers and washers, headlamp wipers and washers ..................................

Climate unit ......................................................................................................................

Cab heater EBERSPÄCHER D1LC ................................................................................

Cab and engine heater WEBASTODW80 MARK II ........................................................

Electrically heated and adjusted seat ..............................................................................

Electrically heated mirror .................................................................................................

Electrically operated mirror ..............................................................................................

Air dryer ...........................................................................................................................

Fuel filter heater, waterseperator heater ..........................................................................

Electrically cab tilt ...........................................................................................................

Radio, voltage divider, loudspeaker, alarm clock .............................................................

Electrically operated window winders ..............................................................................

Electrically operated sunroof ...........................................................................................

SRS-air bag .....................................................................................................................

Electrically operated passenger door lock .......................................................................

Central door lock ..............................................................................................................

Power take-off ..................................................................................................................

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Group 37 Wiring diagram Component wiring diagram index

LE LG LJ LL LO MA MD MN MP MQ MR MS MV MW MX MY NA NB NC NG NJ NO OA OG PA XA XD ZA ZD ZE

Double power take-off ......................................................................................................

Differential lock ................................................................................................................

Bogie lift, 3rd axle lock (RADT-LA) ..................................................................................

3rd axle lock (RADT-A6S) ...............................................................................................

GEARTRONIC- automatic gear shift ...............................................................................

Bogie lift hydraulic ............................................................................................................

Bogie lift hydraulic, with axle load limiter .........................................................................

Air suspension 4x2 ..........................................................................................................

Air suspension 6x2, bogie lift, < 15 tonnes ......................................................................

Air suspension 6x2, bogie lift, < 15 tonnes with time limitation ........................................

Air suspension 6x2, bogie lift, pusher ..............................................................................

Air suspension 6x2, bogie lift, 15 tonnes .........................................................................

AIR-DUMP-drive axle load increase (RADT-A8) .............................................................

AIR-DUMP-drive axle load increase with time limitation (RADT-A8) ...............................

Air suspension 6x4 ..........................................................................................................

Air suspension 6x4, <15 tonnes with time limitation ........................................................

Instrument LHS unit (standard design) ............................................................................

Instrument central unit ....................................................................................................

Instrument RHS unit (standard design) ...........................................................................

Instrument LHS unit (DIS) ...............................................................................................

Instrument RHS unit (DIS) ...............................................................................................

Instrument control lamps module ....................................................................................

ABS, anti-lock brakes .....................................................................................................

Retarder ...........................................................................................................................

Headlight levelcontrol .....................................................................................................

Extra fuses .......................................................................................................................

Key switch relay, rheostat ................................................................................................

Earth connections ............................................................................................................

ADR battery main switch, current limiter ........................................................................

Air heater EBERSPÄCHER TMD (only french market) ...................................................

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