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.
The cost to diagnose the B113D 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.
Under normal operation, the ground is provided to the rear climate control switch through the circuit. When the switch is pressed, ground through an internal resistor is sent to the Rear Audio and Temperature Control (RATC) module through the circuit. The Rear Audio and Temperature Control (RATC) Module sets the OBDII when the module senses continuous voltage drop on the switch output circuit.
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