Braking Sensor/Switch: Description and Operation

CIRCUIT OPERATION
Brake Switch Input
Circuit L50 is an input to the Controller Anti-Lock (CAB) module. The L50 connects to cavity 22 of the CAB connector. Circuit L50 is spliced in with the stop lamps, and is used to provide the controller with information on when the brakes are being applied.

Low Brake Fluid Switch #1
This switch, which is normally OPEN, closes when the brake fluid level is below a certain level. Power for the switch is provided on circuit G9. This circuit is spliced with the park brake switch, Daytime Running Lamp module (Canada only), and the Controller Anti-Lock Brake (CAB).

Ground for the switch is provided on circuit Z1. This circuit terminates at the left front frame rail.