Reverse Lamp Circuit Short
Table of contents
B1277 MERCURY Possible Causes
- Faulty Reverse Lamp
- Reverse Lamp harness is open or shorted
- Reverse Lamp circuit poor electrical connection
- Faulty Body Control Module (BCM)
How do I fix code B1277 MERCURY?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Tech Notes
- B1277:11 Reverse Lamp Circuit Short To Ground
- B1277:15 Reverse Lamp Circuit Short To Battery or Open
Cost of diagnosing the B1277 MERCURY code
The cost of diagnosing the B1277 MERCURY code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
B1277 MERCURY Description
The Body Control Module (BCM) monitors the Reverse Lamp. The OBDII sets when the BCM detects an excessive current draw or open from the reverse lamp output circuit.