Stop Lamps

WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.

The turn signal lamps are also used as stop lamps. The STOP/TURN/HAZARD fuse in the instrument panel (I/P) fuse block supplies battery positive voltage to the body control module (BCM) for the stop lamps.

A 10-volt reference signal and a low reference signal is applied from the BCM to the brake pedal position (BPP) sensor. When the brake pedal is applied, the BPP sensor applies a signal to the BPP sensor signal circuit to the BCM. The BCM then applies battery positive voltage to the LR and RR stop/tail/turn lamps through the LR and RR stop/turn lamps supply voltage circuit. The BCM also supplies a battery positive voltage to the CHMSL through the stop lamp supply voltage circuit. The ground for the LR stop/tail/turn lamp is supplied from G301 The ground for the RR stop/tail/turn lamp and for the CHMSL is supplied from G302.