61 12 180 Replacing Wiring Harness On Function Carrier On Left Or Right Front Door

Overview of function carrier components: 

1. Control unit, front door (door module)
2. Light module (build date up to 09/2004)
3. Sensor, front door
4. Bowden cable
5. Speaker
6. Wiring harness, function carrier
7. Quick-release coupling grey 1.8 mm

   Quick-release coupling white 0.8 mm

   Fig 1: Identifying Function Carrier Components

   Courtesy of BMW OF NORTH AMERICA, INC.

Necessary preliminary tasks: 

• Remove function carrier in front door  . See 51 21 035 REMOVING AND INSTALLING/REPLACING FUNCTION CARRIER ON LEFT OR RIGHT FRONT DOOR .
• Remove control unit in front door  . See 61 35 220 REMOVING AND INSTALLING (REPLACING) CONTROL UNIT FOR LEFT OR RIGHT FRONT DOOR .
• Disconnect sensor plug connection for front door  . See 65 77 740 REMOVING AND INSTALLING (REPLACING) LEFT FRONT DOOR SENSOR .
• Remove speaker  . See 65 13 070 REMOVING AND INSTALLING/REPLACING SPEAKER (MID-RANGE SPEAKER, DOOR AT FRONT) .

Build date up to 09/2004: 

• Disconnect light module plug connection

Risk of mixing up plugs for door lock and control unit!

Mark relevant plugs of wiring harness to be changed.

Ensure correct plug connections for replacement wiring harness through comparison of plugs (wire cross-sections, pin assignment).

Unclip wiring harness (1).

Feed out wiring harness (1) with rubber grommet (2) and remove.