Cruise Control Brake Switch - SaturnFans Forums Dec 29, 2012P0571 - Cruise Control Brake Switch As mentioned before, the brake lights are not working when pressed. I replaced both cruise control and brake light switches, to no avail. One thing I have noticed: if I disconnect the battery, reconnect it, and start the car, the service light is gone and the cruise control works for about 5 min. 1994 Saturn SL1 94 Saturn SL1 Cruise Control?: I Have a 94 To control throttle movement, a cable from the cruise control module pulls on the accelerator linkage at the pedal. that is how the cruise works on your vehicle. The most likely problem would be the cruise cable adjuster,(see diagram) located between the brake switch and the cruise control module the cable is OK, the switch is defective.