Volvo FM9, FM12, FH12 Schematic

Name: Volvo FM9
Brand: Volvo
SKU: 4535047
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Service Manual

Trucks

Group 37

Electrical Schematic

VN, VHD VERSION2

From Build Date April 2004

PV776-20 007110

Foreword

The descriptions and service procedures contained in this manual are based on designs and methods studies carried out up to September 2004.

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 believed 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 an 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 an V.S.T.

Each section of this manual contains specific safety information and warnings which must be reviewed before performing any procedure. If a printed copy of a procedure is made, be sure to also make a printed copy of the safety information and warnings that relate to that procedure. 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.

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 Trucks North America, Inc.

Greensboro, NC USA

Order number: PV776-20 007110

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 Trucks North America, Inc..

USA15171

Contents
VN, VHD ..................................................................................................	3
Electrical Schematics ...............................................................................	3
Illustrations ...........................................................................................	77
Illustration Index, Wiring Harnesses ......................................................	77
Reference ............................................................................................	149
Reference List: Fuses ..........................................................................	149
Reference List: Relays .........................................................................	155
Reference List: Components ...............................................................	156
Reference List: Inline Connectors .......................................................	176
Reference List: Physical Splice Connectors ........................................	186
Glossary ...............................................................................................	190
Wire Color Codes .................................................................................	191

Group 37 Electrical Schematic, VN, VHD

VN, VHD

Electrical Schematics

For instructions on using the schematics, see service information on “Wiring Diagram

User Guide” in Group 37.

Also see:

“Reference List: Fuses” page 149 “Reference List: Components” page 156 “Reference List: Inline Connectors” page 176 “Glossary” page 190

“Wire Color Codes” page 191

Schematic Index

AA	Power supply, starting and charging system (1 of 2)
AB	Power supply, starting and charging system (2 of 2)
AC	Grounding (1 of 2)
AD	Grounding (2 of 2)
BA	Vehicle ECU (1 of 2)
BB	Vehicle ECU (2 of 2)
BC	Instrument cluster, Connectors A and B
BD	Instrument cluster, Connector C
BE	Instrumentation, Qualcomm
BF	Instrumentation, Volvo Link
BG	Bodybuilder Options, VHD
BH	Road Relay
BI	Bodybuilder Module
BJ	Touch Lock
BK	Secondary Instrument Cluster
CA	Engine Control Common
CB	Engine Interface, D12
CC	Engine Control, ISX and ICON
CE	Fuel filter heater
CF	Engine brake switches
CH	Inside/outside air cleaner, VHD
CI	Engine Control, Cummins ISX without ICON
CO	Engine Electronics, D12D
DB	Transmission ECU, Autoshift II
DC	Transmission ECU, Lightning

Fig. 1: AA page 6 Fig. 2: AB page 7 Fig. 3: AC page 8 Fig. 4: AD page 9 Fig. 5: BA page 10 Fig. 6: BB page 11 Fig. 7: BC page 12 Fig. 8: BD page 13 Fig. 9: BE page 14 Fig. 10: BF page 15 Fig. 11: BG page 16 Fig. 12: BH page 17 Fig. 13: BI page 18 Fig. 14: BJ page 19 Fig. 15: BK page 20 Fig. 16: CA page 21 Fig. 17: CB page 22 Fig. 18: CC page 23 Fig. 19: CE page 24 Fig. 20: CF page 25 Fig. 21: CH page 26 Fig. 22: CI page 27 Fig. 23: CO page 28 Fig. 24: DB page 29 Fig. 25: DC page 30

Group 37 Electrical Schematic, VN, VHD

VN, VHD

Transmission ECU, Meritor G Transmission ECU, Allison, VHD (1 of 2) Transmission ECU, Allison, VHD (2 of 2) Transmission ECU, Freedomline

PTO

ABS ECU

Suspension ECU 6x2

Air Dryer / Heated Drain Valve

Lift Axle, VHD

Chassis Air Solenoids, VHD

Chassis Air Solenoids, VN

Central Tire Inflation system

LCM Lighting Control Module (1 of 2) LCM Lighting Control Module (2 of 2) Marker Lights

Driving / Signal Lights

Driving / Fog Lights

Tail Lights and Alarm

Back of Cab Lights, Daycabs

Back of Cab Lights, Sleeper cabs

Snowplow and Beacon Lights

Windshield Wiper/Washer

Horn

Climate Control Unit

Climate Control Unit, Bunk

Shore Power/Inverter

Bunk Functions/Refrigerator (VN 430, 630, 670)

Bunk Functions/Refrigerator/Sink (VN 780)

L3 Sleeper Functions without LECM Sleeper Climate Control without LECM L3 Interior Courtesy Lights

Power Seats

Power Windows/Electric Mirrors Power Windows/Mirrors without DCP Door Functions/Internal Lights

Fig. 26: DD page 31 Fig. 27: DE page 32 Fig. 28: DF page 33 Fig. 29: DG page 34 Fig. 30: DP page 35 Fig. 31: EA page 36 Fig. 32: EB page 37 Fig. 33: FA page 38 Fig. 34: FB page 39 Fig. 35: FC page 40 Fig. 36: FD page 41 Fig. 37: FE page 42 Fig. 38: GA page 43 Fig. 39: GB page 44 Fig. 40: GC page 45 Fig. 41: GD page 46 Fig. 42: GE page 47 Fig. 43: GF page 48 Fig. 44: GG page 49 Fig. 45: GH page 50 Fig. 46: GI page 51 Fig. 47: GP page 52 Fig. 48: GQ page 53 Fig. 49: HA page 54 Fig. 50: HB page 55 Fig. 51: HC page 56 Fig. 52: HD page 57 Fig. 53: HE page 58 Fig. 54: HF page 59 Fig. 55: HG page 60 Fig. 56: IA page 61 Fig. 57: IB page 62 Fig. 58: IC page 63 Fig. 59: ID page 64 Fig. 60: IE page 65

Group 37 Electrical Schematic, VN, VHD

VN, VHD

Cigar Lighter/Auxiliary Power (Cab Front)

Smoke Detector

SRS Airbag

VORAD

Steering Wheel Module/Marker Interrupt Switches

Audio System, 4-speaker

Audio System, 6-speaker

Audio System, 6-speaker with subwoofer, TV Prep Trailer Cable

Auxiliary switches

Diagnostics

Fig. 61: IF page 66 Fig. 62: IG page 67 Fig. 63: JA page 68 Fig. 64: JB page 69 Fig. 65: JC page 70 Fig. 66: KA page 71 Fig. 67: KB page 72 Fig. 68: KC page 73 Fig. 69: MA page 74 Fig. 70: NA page 75 Fig. 71: XA page 76