DTC B2647: Ambient Light Sensor Circuit Low: Notes

BCM monitors White wire between BCM and ambient light sensor to determine when headlights need to be turned on when headlight switch is in AUTO mode. See WIRING DIAGRAMS  . When circuit to BCM is low, DTC will set.

Conditions for setting DTC are:

• White wire is shorted to ground or open, or Gray wire is open
• System voltage is 9-16 volts
• Conditions met for .5 second