How to Use the Wiring Diagrams

How To Use The Wiring Diagrams







The descriptions below apply in general to all wiring diagrams, although not all sections are necessarily contained here.

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, for example. x/2.

Together, this constitutes a component designation, for example 3/2.

There is a list of components at Diagram Legend, where, with the help of the component designation, you can read off the name of the component, for example, 3/2 = light switch. Diagram Legend

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 Lamp
11 Fuse
15 Electrical distribution rail/box
16 Audio
17 Service/diagnostics
18 Contact reel
19 Meter
20 Ignition component/shunt
27 Optics
31 Ground connection
63 Branching point
64 Connector

B. Branching Points
The wiring diagrams contain numbered branching points, for example 63/352.

This information contains a section with a list of branching points. This list shows all the components that are connected to each branching point. Electrical Diagrams

The location of the branching points is shown in the Vehicle Level Harness Locations images. Harness Locations

C. Connectors
Connectors provide a bridge between two cable harnesses and are described in the Vehicle Level Connector Views. Connector Views

D. Electrical Distribution
Operation of the fuses and relays is shown in the "Power and Ground Distribution Diagrams". Electrical Diagrams

E. Data Communication
Today's cars contain CAN and MOST networks that transfer information. Connections to these networks are not shown in their entirety in the respective wiring diagram. Complete information on CAN and MOST communication is found in the "Information Bus". Electrical Diagrams

F. Abbreviations
A number of different abbreviations are used in the diagrams. These are explained in the "Wire Color Code And Other Abbreviations". Wire Color Code Identification and Other Abbreviations

G. Component Location
The appearance and location of components is described in alphabetical order at the Vehicle Level component locations A - Z Component List. Component Locations