Normal Operation
WARNING: This page is about a different car, the 2007 Lincoln Mark LT and 2007 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.
Switched battery voltage is normally provided to the digital transmission range (TR) sensor (automatic transmission) or to the reversing lamp switch (manual transmission) through circuit 295 (LB/PK). When the transmission is placed in REVERSE (R), the digital TR sensor or reversing lamp switch routes voltage through circuit 1043 (DG/YE) to the reversing lamps. Ground is provided to the reversing lamps through circuit 57 (BK).
NOTE:
For early build vehicles, circuit 1043 (DG/YE) changes to circuit 140 (BK/PK) for the rear lamp wiring harness.
Possible Causes
- Fuse
- Circuit 57 (BK) open
- Circuit 140 (BK/PK) open (early build vehicles only)
- Circuit 295 (LB/PK) open
- Circuit 1043 (DG/YE) open
- Digital TR sensor (automatic transmission)
- Reversing lamp switch (manual transmission)