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Volvo VNL Service Manual

Electrical general, group 30
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Electrical General
VNL, VNM
PV776-TSP23760/1

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Summary of Contents for Volvo VNL

  • Page 1 Service Manual Trucks Group New Features Electrical General VNL, VNM PV776-TSP23760/1...
  • Page 2 Greensboro, NC USA Order number: PV776-TSP23760/1 © 1996 Volvo Trucks North America, Inc., Greensboro, NC USA 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 Trucks North America, Inc..

  • Page 3: Table Of Contents

    Contents General ................ 3 Rear Suspension Cab Unloader Control Valve Replacement ............66 Electrical System - VNL, VNM (06.96 to 02.98) ..3 Lift Axle Control Valve Replacement ....... 66 Specifications ............. 5 Fifth Wheel Slider Valve Replacement ....66 Replacement Wire Sizes ..........

  • Page 5: General

    Every effort has been made to provide trouble-free operation, easy maintenance and service, and to provide maximum life of the system and its components. For more information on VNL and VNM electrical circuitry, refer to the vehicle electrical schematics.

  • Page 7: Specifications

    Group 30 Electrical System—VNL, VNM Specifications Specifications Replacement Wire Sizes The size of wire used when installing accessories or re- pairing existing electrical items is dependent on the length of the wire and power requirements of the accessory. The chart below can be used to determine the proper wire size for 12 volt systems.

  • Page 9: Tools

    Group 30 Electrical System—VNL, VNM Tools Tools Special Equipment The following items can be ordered from the vendors listed. Digital Multimeter (DMM) A Digital Multimeter (DMM) is one of the most important tools available for electrical troubleshooting. A multimeter such as a Fluke 87 is recommended for troubleshooting.
  • Page 10 Group 30 Electrical System—VNL, VNM Tools Static Dissipative Mat Make sure the workbench has an anti-static mat which is grounded to the nearest electrical outlet when working on electronic equipment such as the instrument cluster. When working at the anti-static workbench, always keep a wrist strap connected to the anti-static mat.

  • Page 11: Design And Function

    Group 30 Electrical System—VNL, VNM Design and Function Design and Function General Circuit Information Circuit Malfunctions In an electrical circuit, current completes a path from its source through the compo- nent(s), and then back to its source. If it starts at the battery, it must return to the battery.
  • Page 12 Group 30 Electrical System—VNL, VNM Design and Function Short Circuit The term short circuit is used to describe another type of condition which can develop in electrical circuits or units. It refers to a circuit that is completed in the wrong way, such as two bare wires touching each other, so that the current bypasses part of the normal circuit.

  • Page 13: Circuit Types

    Group 30 Electrical System—VNL, VNM Design and Function Circuit Types Ohm’s Law Current is the flow of electrons through a conductor, and is measured in amperes. Voltage (measured in volts) is the force or pressure which pushes the current through the conductor.
  • Page 14 Group 30 Electrical System—VNL, VNM Design and Function Parallel Circuits In parallel circuits, electrical devices are connected by parallel wires. The current divides; part of it flows into one device, part into another. The voltage remains the same across each branch of the circuit as though each branch was connected directly to the source voltage.
  • Page 15 Group 30 Electrical System—VNL, VNM Design and Function Series/Parallel Circuits A series/parallel circuit consists of some components in series and others are in parallel. In the figure the components side by side are in series since there is only one current path. The two circuits above and below each other are in parallel since there are two current paths.
  • Page 16 Group 30 Electrical System—VNL, VNM Design and Function Typical Circuit Components Wiring harnesses, wires & connectors Each circuit uses a wire of a specific size, based on the current demands for that circuit. The circuit number is stamped into the insulation every 76 mm (3 in.). This aids in proper connections and simplifies circuit tracing.
  • Page 17 Circuit breakers are optional equipment. SAE Type 2 modified reset circuit breakers are the only type of circuit breakers approved for use in VNL or VNM vehicles. They may be used on accessory and ignition circuits only. Circuit breakers protect a circuit from overload. When an overload (high current flow) occurs in a circuit, a bimetallic...
  • Page 18 Group 30 Electrical System—VNL, VNM Design and Function Switches and relays Circuit controls are switches or relays. Switches are usually at the beginning of a circuit but can be used to control a ground path. For example, the switch controlling...
  • Page 19 Group 30 Electrical System—VNL, VNM Design and Function Sensors and senders Many electronic signals used by ECUs and the instrument cluster are supplied by sensors and senders. A sensor or sender sends a signal to a control unit, or to the microprocessor in the instrument cluster.

  • Page 20: Starting And Charging System

    Group 30 Electrical System—VNL, VNM Design and Function Starting and Charging System Battery Power Supply Power is supplied from the batteries to the starter sole- noid, then from the starter solenoid battery post via wires 1 and 1-A. (Note that each of these wires contains a fusible link.) Wire I feeds cab main power stud 1, and 1-A feeds...
  • Page 21 Group 30 Electrical System—VNL, VNM Design and Function Ignition and Cranking Supply • From fuse 16, wire 243 supplies constant battery power to the ignition switch. • When the ignition switch is turned to the IGNITION position, power is supplied to wire 196, which ener- gizes the Ignition Power Relay.
  • Page 22 Group 30 Electrical System—VNL, VNM Design and Function...
  • Page 23 Group 30 Electrical System—VNL, VNM Design and Function Ignition Switch W3000681 W3000687 Note: Numbers inside parenthesis are circuit numbers. Ignition Switch Connector Detail The ignition switch is mounted in the key lock assembly. It is a single switch of a new double contact design –...

  • Page 24: Electrical Pass-Through For Cab Wiring, Power And Ground

    Group 30 Electrical System—VNL, VNM Design and Function Electrical Pass-Through for Cab Wiring, Power and Ground W3000827 W3000591 A Pass-through for main cab wiring A Pass-through for chassis wiring to cab Main Cab Electrical Pass-Through and Ground Cab Electrical Pass-Through and Ground Studs...

  • Page 25: Switches And Controls

    The switch for the engine brake is different depending have been given new symbols, for example, the switch on which engine brake is installed. With the Volvo or for the fog lights and the electric heated side mirrors. Cummins M11 engine brake, there is a single switch with 3 positions: OFF , LOW , and HIGH .
  • Page 26 Group 30 Electrical System—VNL, VNM Design and Function Switch Switch Internal Switch Logic Function Hazard Warning W3000577 W3000579 W3000585 Back of Cab Lamp, Heated Mir- ror, Auxiliary Lamps, Traction Control System W3000577 W3000579 W3000588 Power Take Off W3000577 W3000579 W3000587...
  • Page 27 Group 30 Electrical System—VNL, VNM Design and Function Switch Switch Internal Switch Logic Function Engine Brake On/Off (Caterpillar, Detroit, Cummins N14) W3000589 W3000577 W3000578 Engine Brake Low/Med/High (Caterpillar, De- troit, Cummins N14) W3000577 W3000579 W3000583 Engine Brake Off/Low/Hi (VOLVO & Cum-...
  • Page 28 Group 30 Electrical System—VNL, VNM Design and Function Stalk Switches Wiper/Washer Switch W3000581 Wiper/Washer Switch Note: Numbers inside parenthesis are circuit numbers. Controls for the windshield wiper/washer are on the stalk Wiper/washer Switch Connector on the right-hand side of the steering column. Intermittent...
  • Page 29 Group 30 Electrical System—VNL, VNM Design and Function Cruise Control, Turn Signal and Headlamp Dimmer Switch The controls for turn signals, cruise control and high- beam/lowbeam selection are on the stalk switch on the left-hand side of the steering column. The high- beam/lowbeam switch includes a flash-to-pass feature.
  • Page 30 Group 30 Electrical System—VNL, VNM Design and Function W3000761 Note: Turn Signal and High/Low Beam Switch Numbers inside parenthesis are circuit numbers. Turn Signal Connector (3 way) Headlamp Dimmer Switch Connector Circuit Description Circuit Description Stop lamp switch output Output to DRL module low beam, left Left stop &...

  • Page 31: Fuse And Relay Locations

    For more information on the combi relay, Note: Relays are shown from insertion-side view. see the Electronic Control System, VE D12 – VOLVO manual. The windshield wiper module and central door lock module are covered later in this manual.

  • Page 32: Relays In Top Tec Panel

    Group 30 Electrical System—VNL, VNM Design and Function #R1–R13 Relays in Top TEC Panel: W3000774 Maxi-Fuses: W3000828 Battery Maxi-fuses Ignition Maxi-fuses...

  • Page 33: Fuses In Front Tec Panel

    Group 30 Electrical System—VNL, VNM Design and Function #1–40 Fuses in Front TEC Panel: W3000773 #41–48 Fuses in Top Panel: W3000775 Note: Refer to the decal inside the TEC cover for vehicle’s exact fuse descriptions and ratings.
  • Page 34 Group 30 Electrical System—VNL, VNM Design and Function Components in Lower TEC Panel W3000886 Central Door Lock Module, Combi Relay, Wiper/Washer Module Ignition Power Relay Daytime Running Lights Module Accessory Power Relay Accessory and Ignition Power Relays The Accessory and Ignition Power relays are used to transfer the heavy current load coming from the battery to the Ignition/Accessory circuits.
  • Page 35 Group 30 Electrical System—VNL, VNM Design and Function Intermittent Windshield Wiper/Washer Module The windshield wiper module uses inputs from the wiper/washer switch to electronically control the wiper and washer motors when intermittent wipers are in use. It is located under the relay panel, and is accessed by removing the top and front TEC center covers, and the fuse and relay panels.
  • Page 36 Group 30 Electrical System—VNL, VNM Design and Function Central Door Lock Module Central door locks are an optional feature. The central locking can be activated from either the passenger or driver side door lock. If the main supply is activated with one door locked and one unlocked, both sides will be automatically unlocked to prevent the driver being accidentally locked out.

  • Page 37: Lighting System

    Group 30 Electrical System—VNL, VNM Design and Function Lighting System W3000595 Headlamp Rear Access Panel 10 Turn Signal Bulb Hood Locking Ring 11 Headlamp Bulb Mounting/Adjust Screws (9 total) Wire Harness 12 Turn Signal Cover Spring Clips Grommet 13 Mounting Screws...

  • Page 38: Daytime Running Lights

    Group 30 Electrical System—VNL, VNM Design and Function Cab Marker LED Lights (With Sunvisor) When the sunvisor option is installed, the cab marker lights are sealed LED units. When replacing, the entire LED unit must be replaced. Cab marker lights without the sunvisor option are standard bulbs (see Bulb Replace- ment List in this manual).
  • Page 39 Group 30 Electrical System—VNL, VNM Design and Function Stop/Hazard/Turn Lights W3001003 Hazard and Turn Logic Diagram The tail lamps use a single bulb for the stop, hazard and turn indicators. For this reason, the rear hazard and tail lamps function differently than the tractor front and trailer rear signals.
  • Page 40 Group 30 Electrical System—VNL, VNM Design and Function Stop/Hazard Lights Stop/Hazard Lights With Right Turn Signal On • The stop and hazard lights are powered through • Wire 113 supplies power to the right front turn light. fuse 29 through wire 70, which powers the stop light...
  • Page 41 Group 30 Electrical System—VNL, VNM Design and Function Auxiliary Fog and Driving Lights W3001002 • When the Auxiliary light switch is turned ON power is Fog and Driving Light Operation sent through wire 39 to the LED input on the switch...
  • Page 42 Group 30 Electrical System—VNL, VNM Design and Function Bulb Replacement List Bulb Number Amps Back of Cab Lamp 1156 Back-up Lamp 1156 Cab Marker Lamp (without Sunvisor) 0.59 Driving Lamp H9415 2.93 Fog Lamp H9420 Headlamp, High Beam 9007 Headlamp, Low Beam...

  • Page 43: Instrumentation

    Group 30 Electrical System—VNL, VNM Design and Function Instrumentation W3000787 Graphic Display The instrumentation is new. There are several variants of instruments, depending on what options have been The graphic display is in the lower left-hand side of the installed on the vehicle, and on whether the speedometer instrument cluster.

  • Page 45: Service Procedures

    Group 30 Electrical System—VNL, VNM Service Procedures Service Procedures General Work Practices and • The use of dielectric grease is recommended for all terminals exposed to the weather: salt, dirt, or water. Cautions Dielectric grease is needed to provide protection against moisture and the elements.
  • Page 46 Group 30 Electrical System—VNL, VNM Service Procedures Preventing Electrostatic Discharge Battery Charging and Jump Starting (ESD) Do not connect battery charging or jump starting cables to any part of an engine electronic system. This can Anti-static wrist strap and mat damage sensitive electrical devices.
  • Page 47 Intermittent problems may also be caused by was not supplied or recommended by Volvo GM Heavy oxidized or loose connections. Truck Corporation.

  • Page 48: Soldering/Wire Splicing

    Group 30 Electrical System—VNL, VNM Service Procedures Soldering/Wire Splicing Slide a piece of sealant shrink tubing Do not use acid core solder. When replacing wires use onto the wire. the correct wire size as shown in the applicable wiring diagram or parts book. Secure each harness or wire in place to prevent chafing or damage to the insulation due...

  • Page 49: Battery Cable Fusible Link Replacement (Battery To Starter)

    Group 30 Electrical System—VNL, VNM Service Procedures 3714-03-02-02 Battery Cable Fusible Link Re- placement (Battery to Starter) Removal If a battery side fusible link becomes an open circuit, power will not be sup- plied to the cab power stud on that circuit (no continuity between the cab stud and starter solenoid).

  • Page 50: Battery Cable Fusible Link Replacement (Ground Cable)

    Group 30 Electrical System—VNL, VNM Service Procedures Installation 3714-03-02-01 Battery Cable Fusible Link Re- placement (Ground Cable) Slide a 1–1 1/2 in. piece of heat shrink tubing with sealant onto the positive cable where the fusible link was re- Removal moved.
  • Page 51 Group 30 Electrical System—VNL, VNM Service Procedures Installation CAUTION Since the ground side fusible link protects the battery and battery cable, check the electrical system for a short circuit before beginning this procedure to pre- vent another fusible link from melting. Failure to repair the short circuit which caused the fusible link to melt will result in the new fusible link melting.

  • Page 52: Removal From Locking Housing

    Group 30 Electrical System—VNL, VNM Service Procedures 3341-03-02-01 Ignition Switch Replacement (Includes checking switch function) Removal From Locking Housing T8006862 WARNING W3000648 Adjust the steering column forward Disconnect the positive (+) and negative (-) terminals and up where possible. Remove the 3...
  • Page 53 Group 30 Electrical System—VNL, VNM Service Procedures Connect the ignition switch electrical connector. Pull steering column back and up, 5 ± 0.8 Nm where possible. Install front cover by (44 ± 7 in-lb) installing torx bolts. Torque to 5 ± 0.8 Nm (44 ±...

  • Page 54: Ignition Switch And Housing Replacement

    Group 30 Electrical System—VNL, VNM Service Procedures 3341-03-02-02 Adjust the steering column up and to- Ignition Switch and Housing ward you, where possible. Remove Replacement the front steering column cover by re- moving the 3 torx bolts from the cover...
  • Page 55 Group 30 Electrical System—VNL, VNM Service Procedures Connect the ignition switch electrical connector. Adjust the steering column up and to- 5 ± 0.8 Nm ward you, where possible. Install front (44 ± 7 in-lb) cover by installing torx bolts and at- taching rubber grommets at stalk switches.

  • Page 56: Horn Contacts Replacement

    Group 30 Electrical System—VNL, VNM Service Procedures 3623-03-02-01 Horn Contacts Replacement Removal Air Horn Contact W3000791 1) Horn Contacts 2) Contact Assembly Remove the bolt from the steering wheel. Pull the steering wheel from the steering shaft. Remove the 2 clips at the bottom of the steering column cover.
  • Page 57 Group 30 Electrical System—VNL, VNM Service Procedures Installation Remove the contact in the steering wheel with a No. 1 flat tip screwdriver. Insert the wire through the hole in the Push the contact out from the horn steering wheel where the old contact button area.

  • Page 58: Turn Signal/Cc Switch Replacement

    Group 30 Electrical System—VNL, VNM Service Procedures 3643-03-02-01 Turn Signal/CC Switch Re- placement (Includes checking switch function) Removal Make certain the vehicle ignition is OFF before beginning this procedure. W3000790 Install the air horn button by connect- ing wire connectors and pushing the button into the steering wheel.
  • Page 59 Group 30 Electrical System—VNL, VNM Service Procedures Installation Mount the switch assembly to steering 5 ± 0.8 Nm column with the 2 bolts and connect (44 ± 7 in-lb) all electrical connectors. Torque bolts to 5 ± 0.8 Nm (44 ± 7 in-lb).

  • Page 60: Windshield Wiper Switch Replacement

    Group 30 Electrical System—VNL, VNM Service Procedures 3638-03-02-01 Windshield Wiper Switch Re- placement (Includes checking switch function) Removal Make certain the vehicle ignition is OFF before beginning this procedure. W3000648 Adjust steering column forward and up, where possible. Remove bolts from rear column cover and remove cover.
  • Page 61 Group 30 Electrical System—VNL, VNM Service Procedures Installation W3000655 Install the 2 clips on the bottom of the steering column cover. W3000652 Mount the wiper switch to the column 5 ± 0.8 Nm with the bolts on each side. Torque to (44 ±...

  • Page 62: Headlight/Parking Lamp Switch Replacement

    Group 30 Electrical System—VNL, VNM Service Procedures 3646-03-02-06 Headlight/Parking Lamp Switch Replacement (Includes checking switch function) Removal Make certain the vehicle ignition is OFF before beginning this procedure. W3000650 To release the switch panel, reach be- hind the panel and depress the top and bottom clips on the left side.
  • Page 63 Group 30 Electrical System—VNL, VNM Service Procedures Installation W3000646 Removing Headlight/Parking lamp Switch from Panel Disconnect connector of switch being W3000680 Install new headlight/parking lamp removed. Remove switch from panel switch into panel. Push the switch into by pulling locking tabs away from the panel until it locks.

  • Page 64: Road Lamp (Fog Lamp) Switch Replacement

    Group 30 Electrical System—VNL, VNM Service Procedures 3646-03-02-07 Road Lamp (Fog Lamp) Switch Replacement (Includes checking switch function) Removal Make certain the vehicle ignition is OFF before beginning this procedure. W3000650 To release the switch panel, reach be- hind the panel and depress the top and bottom clips on the left side.
  • Page 65 Group 30 Electrical System—VNL, VNM Service Procedures Installation W3000679 Removing Fog/Driving Light Switch from Panel Disconnect connector of switch being W3000680 removed. Remove switch from panel Install new fog/driving lamp switch into by inserting a No. 1 screwdriver into panel. Push the switch into the panel the back of the switch at the top and until it locks.

  • Page 66: Dimmer Control (Dash Illumination) Rheostat Switch Replacement

    Group 30 Electrical System—VNL, VNM Service Procedures 3646-03-02-12 Remove the two screws at the top of the instrument cluster and lay the clus- Dimmer Control (dash illumina- ter face-down on the steering column tion) Rheostat Switch (if steering column is adjustable, ad-...
  • Page 67 Group 30 Electrical System—VNL, VNM Service Procedures Installation Install the new rheostat into panel. In- stall the nut on the rheostat shaft. Connect the terminal connectors and install the knob. W3000812 Use a rag and a pair of pliers to remove the rheostat knob.

  • Page 68: Rear Suspension Cab Unloader Control Valve Replacement

    Group 30 Electrical System—VNL, VNM Service Procedures 5633-03-02-09 Dash Air Switch Replacement Rear Suspension Cab Unloader (Includes checking switch function) Control Valve Replacement Removal (Includes transfer fittings.) Make certain the vehicle ignition is For service procedure, see “Dash Air Switch Replace- OFF before beginning this procedure.
  • Page 69 Group 30 Electrical System—VNL, VNM Service Procedures W3000658 To remove switch, insert No. 1 flat tip screwdriver into back of switch at top and bottom to release locking tabs. W3000656 Push switch out of the panel. Disconnect the 2 terminal connectors...

  • Page 70: Cigar Lighter Replacement

    Group 30 Electrical System—VNL, VNM Service Procedures 3647-03-02-02 Cigar Lighter Replacement (Includes checking component function) Removal W3000696 Push the lighter housing out of the panel enough to get a small flat tip screwdriver under the lip of the cigar lighter. Remove the lighter from the LED housing, and slide the housing out of the dash.

  • Page 71: Hazard Lamp Switch Replacement

    Group 30 Electrical System—VNL, VNM Service Procedures 3646-03-02-11 Hazard Lamp Switch Replace- ment (Includes checking switch function) For the service procedure, see “Dash (Left Side) Switch Replacement” page 69. 3646-03-02-22 Auxiliary Light Switch Replace- ment W3000689 To release the switch panel, reach be-...

  • Page 72: Marker Interrupt Switch Replacement

    Group 30 Electrical System—VNL, VNM Service Procedures 3646-03-02-24 Marker Interrupt Switch Re- placement (Includes checking switch function) For service procedure, see “Dash (Right Side) Switch Replacement” page 71. 3646-03-02-25 Idle Control Switch Replace- ment (Includes checking switch function) For service procedure, see “Dash (Right Side) Switch Replacement”...

  • Page 73: Dash (Right Side) Switch Replacement

    Group 30 Electrical System—VNL, VNM Service Procedures Installation Dash (Right Side) Switch Re- placement Connect electrical connection on Removal switch. Make certain the vehicle ignition is OFF before beginning this procedure. W3000692 Install the new switch, pushing the switch into the panel until it locks.

  • Page 74: Radio Replacement (Dash Mounted)

    Group 30 Electrical System—VNL, VNM Service Procedures 3911-03-02-01 Radio Replacement (Dash Mounted) Note: This procedure applies only to the factory-installed, in-dash radio. Removal Make certain the vehicle ignition is OFF before beginning this procedure. W3000675 Lower Edge of Dash Nut at Radio Mounting Bracket...
  • Page 75 Group 30 Electrical System—VNL, VNM Service Procedures W3000675 Lower edge of dash Nut at radio mounting bracket W3000674 When the tools are inserted, pull Slide the radio into the housing, mak- 1.2–1.6 Nm slightly apart to unlock the radio from ing sure the stud on the rear of the (10–14 in-lb)

  • Page 76: Ignition Power Relay Replacement

    Group 30 Electrical System—VNL, VNM Service Procedures 3645-03-02-02 Remove the ashtray from the ashtray Ignition Power Relay Replace- housing. Remove the 2 screws from ment the ashtray housing, and remove the housing. (Includes checking relay function) Removal Make certain the vehicle ignition is OFF before beginning this procedure.
  • Page 77 Group 30 Electrical System—VNL, VNM Service Procedures Install the OR-M and OR-N wires to 2 ± 0.5 Nm the relay’s small top post. Install the (18 ± 5 in-lb) 196 wire to the relay’s small top post. Torque both of these to 2 ± 0.5 Nm (18 ±...

  • Page 78: Accessory Power Relay Replacement

    Group 30 Electrical System—VNL, VNM Service Procedures 3645-03-02-04 Accessory Power Relay Re- placement (Includes checking relay function) Removal Make certain the vehicle ignition is OFF before beginning this procedure. W3001007 1) Spacers Remove 3 bolts from the fuse panel, and fold the fuse panel outward from the dash to gain access to the mount- ing bolts for the top TEC tray.
  • Page 79 Group 30 Electrical System—VNL, VNM Service Procedures Installation Install the Accessory Power relay into the lower TEC tray with 2 torx bolts (see illustration in Removal proce- dure). Torque to 4.5 ± 0.5 Nm (40 ± 5 in-lb). Connect the 195–A wire to the relay’s large lower post.
  • Page 80 Group 30 Electrical System—VNL, VNM Service Procedures Install the ashtray housing and ash- tray. Torque ashtray mounting screws to 0.4 ± 0.1 Nm (3.5 ± 1 in-lb). Install the fuse panel cover and the top TEC panel cover. Torque screws to 2.5 ±...

  • Page 81: Daytime Running Lamp Control Module Replacement

    Group 30 Electrical System—VNL, VNM Service Procedures 3563-03-02-01 Daytime Running Lamp Control Module Replacement (Includes checking component function) Removal Make certain the vehicle ignition is OFF before beginning this procedure. W3001007 1) Spacers Remove 3 bolts from the fuse panel,...

  • Page 82: Combi Relay Replacement

    Group 30 Electrical System—VNL, VNM Service Procedures Installation 3645-03-02-03 Combi Relay Replacement Install the DRL module into the lower TEC tray with 2 torx bolts (see illustra- Removal tion in Removal procedure). Torque to 4.5 ± 0.5 Nm (40 ± 5 in-lb).
  • Page 83 Group 30 Electrical System—VNL, VNM Service Procedures Installation Install the module in the same location 4.5 ± 0.5 Nm where the old module was installed. (40 ± 5 in-lb) Bolt the module in place with 2 torx bolts. Torque to 4.5 ± 0.5 Nm (40 ± 5 in-lb).

  • Page 84: Power Window Switch Replacement (Right Or Left)

    Group 30 Electrical System—VNL, VNM Service Procedures 3646-03-02-02 Power Window Switch Re- placement (Right or Left) (Includes checking switch function) Removal W3000802 Insert the mirror/window switch re- moval tool between the housing clip and the window switch. When the tool is inserted, push on the switch to clear the switch tabs from the clips.

  • Page 85: Power Mirror Switch Replacement

    Group 30 Electrical System—VNL, VNM Service Procedures 3646-03-02-28 Power Mirror Switch Replace- ment (Includes checking switch function) Removal W3000803 Insert the mirror/window switch re- moval tool between the inner housing lip and the mirror switch. When the tool is inserted, push on the switch to clear the locking tab.

  • Page 86: Digital Clock (Sleeper) Replacement

    Group 30 Electrical System—VNL, VNM Service Procedures 3838-03-02-02 Digital Clock (Sleeper) Re- placement (Sleeper, includes diagnostics) Removal Make certain the vehicle ignition is OFF before beginning this procedure. W3000698 Disconnect the clock electrical connector. Using a small flat tip screw-...
  • Page 87 Group 30 Electrical System—VNL, VNM Service Procedures Installation W3001000 Install the control panel into the bunk 1.5 ± 0.5 Nm by inserting the 3 tabs on the left side (13 ± 5 in-lb) W3000999 1) Clock 2) Switch back into the air vent trim panel and installing the 2 torx bolts.

  • Page 88: Sleeper Reading Lamp Switch Replacement

    Group 30 Electrical System—VNL, VNM Service Procedures 3646-03-02-30 Sleeper Reading Lamp Switch Replacement (Includes checking switch function) For service procedure, see “Sleeper Control Panel Switch Replacement” page 86. 3646-03-02-31 Sleeper Heater Control Switch Replacement (Includes checking switch function) For service procedure, see “Sleeper Control Panel Switch Replacement”...

  • Page 89: Windshield Wiper Motor Replacement

    Group 30 Electrical System—VNL, VNM Service Procedures Installation 3631-03-02-04 Windshield Wiper Motor Re- placement (Includes checking component function) Removal WARNING Park the vehicle on a level surface, apply the parking brakes, and block the wheels to avoid possible injury. Failure to do so can result in personal injury and pos- sible damage to the vehicle due to vehicle movement.

  • Page 90: Windshield Wiper Linkage Assembly Replacement

    Group 30 Electrical System—VNL, VNM Service Procedures Installation 3639-03-02-01 Windshield Wiper Linkage As- Mount the motor to the housing with 3 40–49 Nm sembly Replacement bolts. START all bolts before tighten- (29–36 ft-lb) ing. Torque to 40–49 Nm (29–36 ft-lb).
  • Page 91 Group 30 Electrical System—VNL, VNM Service Procedures W3000662 Remove the upper tank fairing by re- moving the 4 torx bolts. W3000663 Remove 3 screws from the right side drip molding and remove the molding. Remove 3 torx bolts from the bottom of the right side mirror mounting arm.
  • Page 92 Group 30 Electrical System—VNL, VNM Service Procedures W3000664 W3000668 Remove 3 screws from the drip mold- Remove the windshield washer bottle ing on the left side of the cab and by removing the 3 nuts from the remove the drip molding.
  • Page 93 Group 30 Electrical System—VNL, VNM Service Procedures Removal of wiper motor from linkage assembly Remove the nut from the motor linkage arm and push the arm from the shaft. Push the linkage arm away from the area where the motor is bolted to the housing.
  • Page 94 Group 30 Electrical System—VNL, VNM Service Procedures Installation Test the wiper system before installing the body panels to ensure proper op- eration of the system. WARNING Park the vehicle on a level surface, apply the parking brakes, and block the wheels to avoid possible injury.
  • Page 95 Group 30 Electrical System—VNL, VNM Service Procedures W3000670 W3000671 Install the right side cowl panel using 24 ± 4 Nm Install the left side cowl panel using 24 ± 4 Nm bolts on the outside and inside of the (212 ± 35 in- bolts on the outside and inside of the (18 ±...
  • Page 96 Group 30 Electrical System—VNL, VNM Service Procedures W3000662 Install the tank fairing. START all 24 ± 4 Nm bolts, then tighten after aligning fairing. (18 ± 3 ft-lb) Torque to 24 ± 4 Nm (18 ± 3 ft-lb). W3000664 Install the left side drip molding with 3 1.2 ±...
  • Page 97 Operation Numbers 3341-03-02-01 Ignition Switch Replacement ......50 3341-03-02-02 Ignition Switch and Housing Replacement ....52 3563-03-02-01 Daytime Running Lamp Control Module Replacement .
  • Page 100 Volvo Trucks North America, Inc. P.O. Box 26115, Greensboro, NC 27402-6115 Volvo Trucks Canada, Ltd. 5600A Cancross Court, Mississauga, Ontario L5R 3E9 http://www.volvotrucks.volvo.com PV776-TSP23760/1 (6.96) 8.1996 © Volvo Trucks North America, Inc., 1996...

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