Exterior Lighting Systems Description and Operation: Domestic
WARNING: This page is about a different car, the 2003 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
When the driver presses the brake pedal, the switch contacts close and the stop lamp output signal is applied to the CHMSL and to the hazard warning switch. The stop lamp signal is applied from the hazard warning switch to the turn signal switch. The turn signal switch applies the stop lamp switch signal to both of the rear stop/turn lamps, turning them on full bright. The stop/turn lamps ground is applied from G401.