Drivers Door Interior Lock Switch General Electrical Failure
Table of contents
B126A MERCURY Possible Causes
- Faulty Drivers Door Interior Lock Switch
- Drivers Door Interior Lock Switch harness is open or shorted
- Drivers Door Interior Lock Switch circuit poor electrical connection
- Faulty Body Control Module (BCM)
How do I fix code B126A 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.
Cost of diagnosing the B126A MERCURY code
The cost of diagnosing the B126A 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)
B126A MERCURY Description
The Body Control Module (BCM) sends voltage signals to the door lock control switches through the lock and unlock input circuits. When the lock or unlock switch is pressed, the corresponding voltage signal is routed to ground, signaling the BCM to lock or unlock the doors. The door lock control switches have a dedicated ground circuit. The BCM monitors the Drivers Door Interior Lock Switch. The BCM sets the OBDII code when the Drivers Door Interior Lock Switch is not to factory specifications.