B0432 GMC - Low Voltage Level On The Control Circuit Of The RR Defog Relay
B0432 GMC Possible Causes
- Faulty Defog Relay
- Defog Relay harness is open or shorted
- Defog Relay circuit poor electrical connection
- Faulty Body Control Module (BCM)
Cost of diagnosing the B0432 GMC code
The cost of diagnosing the B0432 GMC code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
B0432 GMC Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
B0432 GMC Meaning
The Body Control Module (BCM) monitors the voltage level on the control circuit of the RR DEFOG relay. The voltage level should be near system voltage while the RR DEFOG relay is de-energized. The voltage will be pulled low when the BCM energizes the RR DEFOG relay. The BCM test the control circuit of the RR DEFOG relay while the relay is de-energized.