Brake Lamp: Description and Operation

STOP LAMPS

The ST/LP fuse in the underhood fuse block supplies battery positive voltage to the normally open stop lamp switch. When the driver presses the brake pedal, the switch contacts close and battery positive voltage is supplied to the turn signal hazard flasher module and the VEH CHMSL fuse in the rear fuse block. The turn signal hazard flasher module provides the current flow to the stop/turn lamps which are grounded at G402. The center high mounted stop lamp (CHMSL) is also grounded at G402.

For trailer wiring, the stop lamp circuit is provided by the turn signal hazard flasher module to the trailer wiring harness.