How to Read and Use Wiring Diagrams

SYMBOLS USED IN THE WIRING DIAGRAMS

Symbols: Fuses:

Fuses
In the wiring diagrams, every subsystem is generally shown from the relevant fuse in the main fuse box up to the component or components concerned and on to the grounding point or direct chassis connection.

The power supply to each fuse is shown separately in the system group for positive voltage supplies, where the car's main fuse box, ignition switch, etc. are also covered.

Example:
If the supply to a fuse comes from the +30 terminal, the circuit to the fuse in question will be found in the "Power supply (+30 circuit)".

Symbols: Grounding Points:

Grounding points
Most of the car's grounding points have a component number consisting of a letter and a number, e.g. G2 or G29. The locations of the grounding points on the car are given in the "Grounding Points".

Switches, Relays And Components
Unless otherwise indicated, switches and relays are represented in their unactivated and unenergized state.

When the box round the component is drawn with a solid line, the whole component is shown.

When the box round the component is drawn with a broken line, only part of the component is shown.

The components are designated by a serial number and one or more letter suffixes which indicate location or variant. Locations are indicated by upper-case (capital) letters, e.g. 298FL, while variants are indicated by a lower-case (small) letter, e.g. 47a. The following abbreviations for the various locations are used:

C = Centre
D = Driver side
F = Front
H = Hatch (tailgate)
P = Passenger side
R = Rear
LH = Left Hand
RH = Right Hand

Symbols: Crimped Connections:

Crimped Connections
To reduce the number of connectors, the car's wiring contains several crimped connections. The symbol for these connections in the wiring diagram is shown in the above image.