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 mm 2
| 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
        
        
         C
        
        omfort Systems | |
| • | D
        
        
         D
        
        iagnostics | |
| • | E
        
        
         E
        
        ngine Systems | |
| • | G
        
        
         G
        
        earbox Systems | |
| • | I
        
        
         I
        
        nstrumentation Systems | |
| • | L
        
        
         L
        
        ighting Systems | |
| • | P
        
        
         P
        
        ower Supply Systems | |
| • | Q
        
        Anti-Theft Alarm | |
| • | S
        
        
         S
        
        afety Systems | |
| • | T
        
        
         T
        
        elecom Systems | |
| • | V
        
        
         V
        
        isibility Systems | |
| • | W
        
        
         W
        
        arning 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 in this manual. 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 mm 2 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.

 
		