Code 11 (Stoplight Switch Circuit)
- This condition occurs only when driving above 35 MPH. Depress brake pedal and check stoplight operation. If stoplights do not operate, repair stoplight circuit, and retest system. If stoplights operate properly, turn ignition off. Unplug control module connector. Measure voltage at module connector pin No. 11 while depressing brake pedal. See Figure .
- If voltage is less than 9 volts, repair open between stoplight switch and control module. If voltage is 9 volts or more, check 4-way flasher and wiring. A problem with 4-way flasher or wiring could cause feedback through stoplight circuit.