Circuit Description
The stoplight switch is a normally closed switch. With ignition switch in the RUN position and brake pedal not depressed, ignition voltage will be present at the EBCM. When brakes are applied, the ignition voltage at the EBCM will be zero.
Conditions for setting DTC:
- Vehicle speed greater than 35 MPH for 10 seconds followed by vehicle at rest for one second.
- Stoplight switch never switching during the described condition.