Volvo Truck Service Manual FH12 FH16 (EN)

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D Foreword The descriptions and service procedures contained in this manual are based on designs and methods studies carried out up to March 95. 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 must be 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 could occur.

Volvo Truck Corporation Gцteborg, Sweden Order number: TSP23665/1 © 95 Volvo Truck Corporation, Gцteborg, Sweden 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. ENG01465

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D Contents Component wiring diagram FH12, FH16 LHD ..................................... 2 Component wiring diagrams ................................................................ 6 Illustrations ........................................................................................... 48 Circuit board (32) electrical centre ................................................... 114 Fuses on circuit board (32) electrical centre ................................... 116 Relays on circuit board (32) electrical centre .................................. 117 Cable harnesses ................................................................................

118 List of components ............................................................................ 121 Abbreviations ..................................................................................... 126 Cable colour code .............................................................................. 127 Feedback 1

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Component wiring diagram FH12, FH16 LHD

D Group 37 Wiring diagram Component wiring diagram FH12, FH16 LHD Component wiring diagram FH12, FH16 LHD Starter system, current supply, engine preheating 24 V FH12, Ul - unit injector, exhaust brake, exhaust pressure governor FH16, EDC - electronically controlled fuel injection, exhaust brake, exhaust pressure governor Full beams, dipped beams, parking lights, side marker lights, roof lights and tail lights Foglights Spotlights Brake lights Exhaust brake and compression brake Direction indicators, hazard warning lights Reversing lights Loading light, fifth wheel light Roof sign (standard cab) Roof sign (high cab) Interior lights, instep lights, bunk lights and luggage compartment lights, 24 V socket Ashtray light, cigarette lighter 12 V socket 2

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Component wiring diagram FH12, FH16 LHD

D Group 37 Wiring diagram Component wiring diagram FH12, FH16 LHD Horn Reverse warner Windscreen wipers and washers, headlamp wipers and washers Air conditioning Cab heater (DL1C) Engine/cab heater (DW80) Heated seat Electrically adjustable seat Electrically heated rearview mirror Electrically operated rearview mirror Air dryer Fuel filter heater Cab tilt unit Radio, voltage converter, loudspeaker, alarm clock/timer Electrically operated window winder Seat belt Electrically operated door lock 3

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