Retrofitting LED tail lights on a 2012 Volkswagen Sportwagen requires careful wiring modifications. This guide outlines the complete wiring process, including pre- and post-modification diagrams, based on factory wiring schematics from eRwin. While the AFS functions flawlessly, coding byte 18 remains outstanding.
Original Halogen Wiring (BEFORE MOD)
Left Hand (LH) Halogen 10-Pin Connector (T10i):
- Pin 1: VACANT
- Pin 2: VACANT
- Pin 3: VACANT
- Pin 4: Low Beam Bulb and DRL (connects to T52a/6)
- Pin 5: GROUND
- Pin 6: Low Beam Bulb (connects to T52a/11)
- Pin 7: VACANT
- Pin 8: Left High Beam Bulb (connects to T52a/5)
- Pin 9: Turn Signal Bulb (connects to T52a/10)
- Pin 10: Left Position Bulb/Side Marker (connects to T52c/26)
Right Hand (RH) Halogen 10-Pin Connector (T10j):
- Pin 1: VACANT
- Pin 2: VACANT
- Pin 3: VACANT
- Pin 4: Low Beam Bulb and DRL (connects to T52c/47)
- Pin 5: GROUND
- Pin 6: Low Beam Bulb (connects to T52c/52)
- Pin 7: VACANT
- Pin 8: Right High Beam Bulb (connects to T52c/46)
- Pin 9: Turn Signal Bulb (connects to T52c/50)
- Pin 10: Right Position Bulb/Side Marker (connects to T52a/44)
Modified HID Wiring (AFTER MOD)
Left Hand (LH) HID 14-Pin Connector (T14L):
- Pin 1: CAN Bus High
- Pin 2: CAN Bus Low
- Pin 3: VACANT
- Pin 4: FUSE #6 (10 amp)
- Pin 5: GROUND
- Pin 6: HID Lamp Control Module (connects to T52a/11)
- Pin 7: GROUND
- Pin 8: VACANT
- Pin 9: Turn Signal Bulb (connects to T52a/10)
- Pin 10: DRL and Position Control Module (connects to T52c/26)
- Pin 11: High Beam Shutter (connects to T52c/48)
- Pin 12: DRL and Position Control Module (connects to T52a/6)
- Pin 13: VACANT
- Pin 14: VACANT
Right Hand (RH) HID 14-Pin Connector (T14r):
- Pin 1: CAN Bus High
- Pin 2: CAN Bus Low
- Pin 3: VACANT
- Pin 4: FUSE #5 (10 amp)
- Pin 5: GROUND
- Pin 6: HID Lamp Control Module (connects to T52c/52)
- Pin 7: GROUND
- Pin 8: VACANT
- Pin 9: Turn Signal Bulb (connects to T52C/50)
- Pin 10: DRL and Position Control Module (connects to T52a/44)
- Pin 11: High Beam Shutter (connects to T52c/49)
- Pin 12: DRL and Position Control Module (connects to T52a/28 and T52c/47)
- Pin 13: VACANT
- Pin 14: VACANT
This detailed wiring information provides a comprehensive guide for installing LED tail lights on a 2012 Sportwagen. Remember to consult official documentation for specific coding instructions related to byte 18 for optimal functionality.
