B0685 - Security System Indicator Circuit Short to Ground

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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B0685 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 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 connector's pins.

Cost of diagnosing the B0685 code

    Labor: 1.0

    The cost of diagnosing the B0685 code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

B0685 Possible Symptoms

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

B0685 Description

The 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.
OBDII Code B0685 - Security System Indicator Circuit Short to Ground - AutoCodes.com

B0685 More Information

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B0685 Information for specific makes

  • B0685 BUICK Security System Indicator Circuit Short to Ground
  • B0685 CADILLAC Security System Indicator Circuit Short to Ground
  • B0685 CHEVROLET Security System Indicator Circuit Short to Ground
  • B0685 GMC Security System Indicator Circuit Short to Ground

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