volvo Workshop Repair Guides

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Early Design

How To Use The Wiring Diagrams

A. Component designation

Every component has a component designation that consists of two parts.

The first part is a type number that describes the type of component in question, for example 3/xx.

The second part of the designation is a serial number, e.g. x/2.

Together, this constitutes a component designation, e.g. 3/2.

At the end, list of components, where, with the help of the component designation, you can read off the name of the component, for example, 3/2 = light
switch.

List of type numbers

The list shows which type of component that respective type numbers refer to, for example, 3/x = switch, 6/x = electric motor, etc.

1

Battery

2

Relay

3

Switch

4

Control module

5

Driver Information Module

6

Electric motor

7

Sensor

8

Actuator

9

Heating element

10

Light

11

Fuse

15

Electrical distribution rail/box

16

Audio

17

Service/diagnostics

18

Contact reel

Relays and Modules > Relays and Modules - Transmission and Drivetrain > Relays and Modules - Differential > Control Unit, Differential Lock > Component Information > Diagrams > Diagram Information and Instructions > Page 1448

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