Circuit Description
WARNING: This page is about a different car, the 1999 GMC Sierra and 1999 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
BCM monitors circuit No. 80 (Light Green wire) to determine if ignition key is in ignition. This signal provides audible warning of ignition key being left in ignition. Signal also provides exterior lighting when ignition key is removed. DTC will set when circuit is shorted to battery voltage or open, and ignition has been turned on.
Conditions for setting DTC:
- Circuit No. 80 is shorted to battery voltage or is open when ignition has been turned on.
- System voltage 9-16 volts.
- Conditions met for .5 second.