B0685 GMC - Security System Indicator Circuit Short to Ground
B0685 GMC Possible Causes
- Faulty Light/Sunload Ambient Sensor
- Light/Sunload Ambient Sensor harness is open or shorted
- Light/Sunload Ambient Sensor circuit poor electrical connection
- Faulty Body Control Module (BCM)
First diagnose B0685 GMC code
Check 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 terminals.
Cost of diagnosing the B0685 GMC code
Labor: 1.0The cost of diagnosing the B0685 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.
B0685 GMC Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
B0685 GMC MeaningThe security LED is controlled by the Body Control Module (BCM) based on commands from the content theft deterrent system. The security LED is located in the dash as part of the ambient light sensor and is supplied ground at all times. When the content theft deterrent system requests the LED be commanded ON, the BCM applies voltage to the security indicator control circuit, illuminating the LED.
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