Interior Lighting Output Circuit Short
Table of contents
B1313 MERCURY Possible Causes
- Faulty Interior Lamp
- Interior Lamp harness is open or shorted
- Interior Lamp circuit poor electrical connection
- Faulty Body Control Module (BCM)
How do I fix code B1313 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
- B1313:11 Interior Lighting Output Circuit Short To Ground
- B1313:15 Interior Lighting Output Circuit Short To Battery or Open
Cost of diagnosing the B1313 MERCURY code
The cost of diagnosing the B1313 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)
B1313 MERCURY Description
The Body Control Module (BCM) fuse supplies power for the interior courtesy lamps (and the running board lamps if equipped). When the BCM receives the required input (such as an open door or request from the instrument panel dimmer switch), it provides voltage to the interior courtesy lamps. This Diagnostic Trouble Code (DTC) sets when the BCM detects a short to ground or open from the courtesy lighting output circuit.