BMW GM3 Wiring Description
These are taken from the E39 wiring diagram. I have noticed
many differences between the GM3 used in the E38, E39 and E53 (X5) as well
as between the different years.
I offer a repair service for GM3 modules that have the common problem of no door locks (front or rear) from the key fob or central locking button and no interior lights when a door is open.---> GM3 Repair Service This problem is NOT the relays or the BTS430K2 so you can stop thinking about replacing them in hopes that it will fix the problem. Relays RLY3, 4 and 5 do control the door locks, but, they only control the rear doors. The front door are controlled by PM modules located in the doors. Relays RLY1 and RLY2 control the rear windows. Again, the front windows are controlled by PM modules located in the doors.
|
Pin
|
Function on Connector X254 | Wire Size/Color |
|
1
|
Ground | 0.5 WS/GE |
|
2
|
MFFHA - Window Motor Left Rear-Open (from RLY2) | 0.5 BL/GN |
|
3
|
MERHK - Unlock Trunk Lid | 0.5 BL/GE |
|
4
|
Fused +12V in | 0.5 WS/GE |
|
5
|
MFBHA - Window Motor Right Rear-Open (from RLY1) | 0.5 SW/RT |
|
6
|
MZS - Signal Lock | 0.5 SW/BL |
|
7
|
Unknown (from U7) | |
|
8
|
Ground | 0.75 SW/BL |
|
9
|
SERV1 - Servotronic Control (from U1) | 0.35 BR/BL |
|
10
|
Fused +12V in (powers U1-6 among other things) | 0.35 BR/RT |
|
11
|
SERV2 - Servotronic Control | 0.5 SW/GE |
|
12
|
MFFHZ - Window Motor Left Rear-Close (from RLY2) | 0.5 SW/RT |
|
13
|
MVR - Door Lock Motor Rear Doors | 0.5 WS/GN |
|
14
|
MER - Unlock Signal Door Lock/tank Flap Motor | 0.5 WS/GN |
|
15
|
MFBHZ - Window Motor Right Rear-Close (from RLY1) | 0.35 VI/WS |
|
16
|
Unknown (from U7) | |
|
17
|
DWAH - Horn Signal Anti Theft (from U3) | 0.5 GN/BL |
|
18
|
WP - Signal Washer Pump (from U2) | 0.5 GR/SW/GE |
|
19
|
VA - Signal Consumer cut-off (from U6) | 0.5 SW/GE |
|
20
|
IB - Signal Interior Lights (from U4 & U5) | 0.35 BR/GE |
| 7 & 16- Not Used |
|
Pin
|
Function on Connector X332 | Wire Size/Color |
|
1
|
Fused +12V in | 2.5 RT/GR |
|
2
|
Interior/Reading Lamp Front | 1.0 SW |
|
3
|
Windshield Washer Switch | 1.5 RT/GE |
|
4
|
Windshield Wipe Signal 2 | 2.5 BL/GN |
|
5
|
Windshield Wipe Signal 1 | 2.5 BL/RT |
|
6
|
Signal Door Contact Right Rear | 2.5 BL/VI |
|
7
|
Signal Door Contact Left Rear | 2.5 BL/GR |
|
8
|
Signal Door Contact Passenger | 4.0 RT/GN |
|
9
|
Signal Unlock Lift Gate Lock Switch | 2.5 RT/SW |
|
10
|
Intensive Wash Control | 2.5 RT/GN |
|
11
|
Trunk Lid Closed Signal | 2.5 SW/GE |
|
12
|
K-Bus | 0.35 WS/RT/GE |
|
13
|
FBZV Central Locking Signal Electrochromatic Rear View Mirror | 0.35 WS/GE |
|
14
|
Ground | |
|
15
|
Signal Close Window LH rear switch | |
|
16
|
Intensive Wash Signal Wiper/Washer Switch | |
|
17
|
Open Window Signal RH rear switch | |
|
18
|
Close Window Signal RH rear switch | |
|
19
|
Soft-Close automatic unlock signal | |
|
20
|
Signal Wipers in Motion | |
|
21
|
Trunk Lid Open Signal Rear Window Servo opening switch | |
|
22
|
Signal Locked Lift Gate Lock Switch | |
|
23
|
Fused +12V in | |
|
24
|
Signal Close Global Locking Switch | |
|
25
|
P-Bus | |
|
26
|
Signal Window Open LH Rear Switch | |
|
Pin
|
Function on Connector X253 | Wire Size/Color |
|
1
|
Signal - Driver's Door Contact | 0.35 SW/BL |
|
2
|
Signal - Engine Hood | 0.5 BL/RT |
|
4
|
RDDWA - Tire Pressure | 0.35 BL/GE |
|
5
|
INRS - Interior Protection | 0.35 SW/WS |
|
6
|
Interior Protection | 0.35 GR/BL |
|
7
|
Wiper-Washer Control | 0.35 GR/SW |
|
8
|
NG - Vehicle Tilt Sensor | 0.35 GE/RT |
|
10
|
TOEHK - Signal - Trunk Lid Open | 0.35 WS/RT/G |
|
11
|
TOEHKI - Signal - Trunk Lid Open | 0.5 BR/SW |
|
12
|
EKSFH - Window Pinch Strip Left Rear | 0.75 WS |
|
13
|
CA - Signal - Crash | 0.75 SW |
|
14
|
Drive Away Protection | 0.75 SW |
|
15
|
WI1 - Wiper Control I - Wiper Relay | 0.75 SW |
|
16
|
WI2 - Wiper Control II - Wiper Relay | 0.5 GR/GN |
|
17
|
SRA - Headlight Wash Control | 0.35 BR/VI |
|
18
|
KISI - Intensive Wash Control | 0.5 WS/SW |
|
19
|
DWAL - Electrochromatic Rear View Mirror | 0.5 WS/SW |
|
20
|
ST - Tilt Sensor | 0.5 BL/RT |
|
21
|
Soft-close motor signal Close (from MY04) | 0.35 BR/SW |
|
22
|
RERHK - Relay Unlock trunk lid | 0.35 BR/GR |
|
23
|
DFAHL - Signal - Speed | 0.5 BR/GR/GE |
|
24
|
EKSBH - Window Pinch Strip Right Rear | 0.5 BR/GR/GE |
|
25
|
SWINT - Intermittent Wiper Voltage Supply | 0.5 VI/GE |
|
26
|
Ground | 0.35 BR/RT |
| 3, 4, 9, Not Used |
| E38 | 7-Series | ||
| X254-4 | Fuse 27 | 30A | |
| X254-10 | Fuse 4 | 20A | |
| X332-1 | Fuse 11 | 7.5A | |
| X332-23 | Fuse 38 | 5A |
| E39 | 5-Series | ||
| X254-10 | Fuse 4 | 20A | Windshield washer, passenger & trunk lighting |
| X254-4 | Fuse 27 | 30A | Central locking and rear windows |
| X332-1 | Fuse 11 | 7.5A | General module, servotronic |
| X332-23 | Fuse 38 | 5A | General module, horn, diag plug, rear wash/wipe and rain sensor |
| E53 | X5 | ||
| X254-10 | Fuse 27 | 20A | Windshield washer, passenger & trunk lighting |
| X254-4 | Fuse 60 | 30A | Central locking and rear windows |
| X332-1 | Fuse 14 | 5A | General module and diag plug |
| X332-23 | Fuse 41 | 5A | General module, rear wash/wipe and rain sensor |
|
Color Code
|
Color
|
|
SW
|
Black
|
|
BR
|
Brown
|
|
RT
|
Red
|
|
GE
|
Yellow
|
|
GN
|
Green
|
|
BL
|
Blue
|
|
VI
|
Violet
|
|
GR
|
Gray
|
|
WS
|
White
|
|
Wire Size (mm2)
|
AWG equivalent
|
|
0.35
|
20
|
|
0.50
|
18
|
|
0.75
|
16-17
|
|
1.0
|
15-16
|
|
2.5
|
11-12
|