Start by checking 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.
B1013:11 Heater Rear Defog Switch Circuit Short to Ground
B1013:23 Heater Rear Defog Switch Signal Stuck Low
The cost to diagnose the B1013 Mercury code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.
The Body Control Module (BCM) monitors the Heater Rear Defog Switch. The BCM sets the OBDII code when the Heater Rear Defog Switch is not to factory specifications.
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