Lead Markings

The leads are marked with a three-part lead code, e.g.:

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

Position Number
All leads have an alphabetical designation followed by an individual number. The letter indicates the group of systems to which the lead belongs:
- 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 View systems
- W Warning systems
- X Other systems (e.g. bus)

The number is individual except for:
- 15 = +15-supply
- 30 = +30-supply
- 31 = ground
- 54 = +54-supply

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

Colour Code
The following colour codes are used in the wiring diagrams of the manual. The colour codes can also be used in combination, e.g. RD/BU, GY/WH.

As of M01, dual-colour cables have been introduced with at least two colour fields of each colour. Some small wiring harnesses may still have the old type of colour marking.

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

Lead Area
Indicates the cross-sectional area in sq.mm and is of immediate importance for the lead's current capacity.

Resistance To Temperature
As of M00, the front harness and engine harness of Saab 9-3 have a new type of cable casing with a greater resistance to temperature. When cables in these harnesses are replaced, cables with the new type of insulation must be used.