Brake Stop Light Switch & Circuit Test

Check for stop light operation with a maximum brake pedal effort of 6 lbs. Check brake pedal actuation and stop light switch if pedal effort required is in excess of specification. If stop lights operate correctly, check battery voltage at black/green stripe wire at six-way connector. Depress pedal until stop lights are lit and check voltage at red/black stripe wire at six-way connector. If voltage readings differ by more than 1.5 volts, high resistance exists in stop light circuit and must be corrected. If stop lights do not work, the stop light switch, supply circuit and bulbs must be checked for correct operation.