Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
B1C83:11 Rear Defog Relay Circuit Short to Ground
B1C83:12 Rear Defog Relay Circuit Short to Battery
B1C83:13 Rear Defog Relay Circuit Open
To diagnose the B1C83 Ford code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.
When the engine is running and the heated mirror/rear window defrost switch (integral to the Heating, Ventilation, and Air-Conditioning (HVAC) Module or Front Controls Interface Module (FCIM) if equipped with navigation system) is pressed, the HVAC module activates the rear window defrost relay. For vehicles equipped with navigation system, the FCIM sends the defrost request message to the HVAC module over the Controller Area Network (CAN). When the rear window defrost relay is active, voltage is supplied to the LH and RH exterior mirror glass and spotter mirror glass (if equipped). The LH and RH mirrors do not share the same ground circuits. The OBDII codes sets when the HVAC module senses a short to ground, short to voltage or open on the heated mirror/rear window defrost relay control circuit.
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