Code 124 (Brakelight Circuit Disengagement)

Code 124 is set if cruise control is disengaged by depressing brake pedal and closing brakelight switch. Otherwise, cruise control unit terminal 6B was not connected to ground through brakelight bulbs at moment of disengagement. Check for loose wires or connectors and an incorrectly adjusted brakelight switch. See Brakelight Switch Check (Response Code 132)  under COMPONENT TEST MODE.