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B1C83 Ford Code - Rear Defog Relay Circuit

- Code Popularity: 2,684 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC B1C83 Ford?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Rear Defog Relay
  • Rear Defog Relay harness is open or shorted
  • Rear Defog Relay circuit poor electrical connection
  • Faulty Exterior Mirror
  • Faulty Heating, Ventilation, and Air-Conditioning (HVAC)
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How to Fix the DTC B1C83 Ford?

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.

Code Tech Notes

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

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What is the Cost to Diagnose the Code?

Labor: 1.0

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.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

Code B1C83 Ford Description

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.

OBDII Code B1C83 Ford - Rear Defog Relay Circuit - AutoCodes.com
B1C83 Ford Code - Rear Defog Relay Circuit

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Code B1C83 Ford comments

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