Grand Cherokee 2WD L6-4.0L VIN S (1997)
Brake Switch (Cruise Control): Description and Operation
SYSTEM OPERATION
Vehicles equipped with the speed control option use a dual function stop lamp switch. The switch is mounted in the same location as the
conventional stop lamp switch, on the brake pedal mounting bracket under the instrument panel. The PCM monitors the state of the dual function
stop lamp switch.
CIRCUIT OPERATION
Circuit L50 from the stop lamp switch provides the brake switch input to the Controller, Anti-Lock Brakes (CAB). When the brake pedal is
depressed, the stop lamp switch closes to supply battery voltage from circuit L16 to circuit L50. Circuit L50 connects to the CAB. Circuit L16
originates at fuse 9 in the junction block. Circuit A250 from fuse 11 in the Power Distribution Center (PDC) supplies power to junction block fuse
9.
