Below is a BMW General Module 5 (aka ZKE5 and GM5)I have gone through the wiring diagrams and compiled this list of connections to the module. Since this module is used in the 3-series sedan, coupe, convertible and wagon as well as the Z4 and X3 there are some differences between the cars which are not listed, but, this list is generally correct. For the most accurate information go to the BMW WDS and look up your specific car.
Pin
Function on Connector X254
Wire Size/Color
1
SFBHZ2 - Window Switch Right Rear (S42-1)
0.5 WS/GE
2
SFFHZ - Driver's Window Switch for Rear Driver Side Window, Close (S126-9)
0.5 BL/GN
3
Front Passenger's Window Switch for Rear Passenger Side Window, Close (S127-4)
0.5 BL/GE
4
SFFHZ2 - Window Switch Left Rear (S41-1)
5
Park Angle/Tilt Sensor, In (B28-4)
0.5 SW/RT
6
Park Angle/Tilt Sensor, Out (B28-1)
0.5 SW/BL
7
Engine Hood Switch (S19-2)
0.5 VI/GN
8
Anti-Theft Horn, Out (H1)
0.75 SW/BL
9
To A36, rear washer and wiper module on Wagons (X13268-6)
0.35 BL/GE
10
ERHK - InputSedan & Coupe - Trunk lock cylinder
0.35 BR/BL
11
Left Windscreen Washer Jet Heater from 2004-03
0.5 GN/GE
12
EKSBH - Window Anti-Trap Strip Right Rear
0.35 BR/RT
13
Not Used
----
14
SFFHA - Driver's Window Switch for Rear Driver Side Window, Open (S126-6)
0.5 SW/GE
15
Front Passenger's Window Switch for Rear Passenger Side Window, Open (S127-5)
16
SFFHA2 - Window Switch Left Rear (S41-4)
0.5 WS/GN
17
SFBHA2 - Window Switch Right Rear (S42-4)
18
19
Signal, Interior Protection II (A123) (Convertible Only)
20
Tire Pressure Control Unit
0.35 VI/WS
21
KSIS - Driver's Window Disable Switch (S126-8)
0.5 GN/BL
22
VA2 - Cig Lighter light & Gear shift light (2002/09 on)
0.75 RT/GN
23
Rear View Mirror LED, Alarm Indicator
0.5 GR/SW/GE
24
Signal, Interior Protection Unit I (A121)
25
Common with pin X254-11 Right Windscreen Washer Jet Heater
26
EKSFH - Window Anti-Trap Strip Left Rear
0.35 BR/GE
Function on Connector X253
Windshield Wiper Switch 1 (S5-7)
0.35 SW/BL
VRBT - Lock Front Passenger Door
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