Load Shed Control Circuit Short
Table of contents
B130C MERCURY Possible Causes
- Faulty Trailer Battery Charge Relay
- Trailer Battery Charge Relay harness is open or shorted
- Trailer Battery Charge Relay circuit poor electrical connection
- Faulty Body Control Module (BCM)
How do I fix code B130C 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
- B130C:12 Load Shed Control Circuit Short To Battery
- B130C:14 Load Shed Control Circuit Short To Ground or Open
Cost of diagnosing the B130C MERCURY code
The cost of diagnosing the B130C 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)
B130C MERCURY Description
The trailer battery charge relay coil receives voltage from the Battery Junction Box (BJB) fuse when the ignition is in RUN. The BJB fuse supplies voltage to the Trailer Battery Charge Relay switch side at all times. The Body Control Module (BCM) controls the ground side for the battery charge relay coil.
The BCM provides ground for the trailer battery charge relay when the ignition is in RUN and the BCM determines that the battery voltage is not low. When the trailer battery charge relay is energized, the voltage is routed to the trailer tow connector.