STOPLAMP Switch

The stoplamp switch is mounted in the brake pedal bracket and operated by the brake pedal. The stoplamp switch is a two pole switch: The Brake Switch (BS) pole supplies a brake pedal status signal to the ABS module; the Brake Lamp Switch (BLS) pole operates the stoplamps and also supplies a brake pedal status signal to the ABS module and to the ECM.

While the brake pedal is released:

• The BS contacts are closed, and connect an ignition power feed from the CJB to the ABS module.
• The BLS contacts are open.

When the brake pedal is pressed:

• The BS contacts open.
• The BLS contacts close, and connect an ignition power feed from the CJB to the three stoplamps, the ABS module and the ECM.

The ABS module monitors the status inputs from the stoplamp switch and broadcasts the brake pedal status and an associated quality factor on the high speed CAN bus.

The stoplamp switch is mounted in the brake pedal bracket and operated by the brake pedal. The stoplamp switch is a hall effect switch with dual status outputs. Both of the outputs are supplied to the ECM. One of the outputs is also supplied to the CJB, for operation of the stoplamps. The ECM broadcasts the status of the stoplamp switch on the high speed CAN for use by other systems.

Power for the stoplamp switch is provided by an ignition feed from the CJB. The power circuit is completed by a ground connection from the stoplamp switch to a ground on the body.