Lead Markings

Lead Markings

Leads are marked with a code consisting of three parts, e.g.:

P15-5 YE/GY 2.5

where:
The first part (P15-5) is a position number
The second part (YE/GY) is the colour code
The third part (2.5) is the cross-sectional area in sq.mm

Position number
All leads are provided with a letter designation followed by an individual number.

The letter designates which group of systems the lead belongs to:
- C Comfort Systems
- D Diagnostics
- E Engine Systems
- G Gearbox Systems
- I Instrumentation Systems
- L Lighting Systems
- P Power Supply Systems
- Q Anti-Theft Alarm S Safety Systems
- T Telecom Systems
- V Visibility Systems
- W Warning Systems
- X Other systems (e.g. bus)

The numbers are individual, except for:
- 15 = +15 current
- 30 = +30 current
- 31 = ground
- 54 = +54 current

Leads with the same letter and number, e.g. E110, E110-1, E110-2, etc. usually belong to the same function.

Colour code
The following colour codes have been used in the wiring diagrams. The colour codes can also be used in combinations, e.g. RD/BU, GY/WH.

Dual-colour cables have been introduced from M01 with at least two sections of each colour. Certain smaller wiring harnesses may still have the old type of colour marking however.

Code Colour
BK Black
BN Brown
BU Blue
GN Green
GY Grey
OG Orange
PK Pink
RD Red
VT Violet
WH White
YE Yellow

Cross-sectional area
The cross-sectional area of the conductor is specified in sq.mm and determines the current that the cable is capable of carrying.

Thermal stability
The front harness and engine harness have a new type of cable sheath with greater thermal stability on Saab 9-3 from M00. Cables with the new type of insulation must be used when changing cables in the engine harness.