Circuit Description
WARNING: This page is about a different car, the 1999 Pontiac Grand Am and 1999 Oldsmobile Alero. However, it is still accessible from the selected car via links, so may be relevant.
BCM monitors circuit No. 28 (Black wire) for short to ground conditions. BCM will set DTC B2752 if circuit No. 28 is shorted to ground for longer than 30 seconds and BCM is not commanding the horn relay ON. System voltage must be 9-16 volts for DTC to set. Current DTC will clear after the next fault free ignition cycle. DTC will clear from history after ignition switch is cycled on and off 100 times with no faults present. DTC can also be cleared using scan tool.