Test FD: Step 13

13) Check For Brake Light Power to Harness Connector  Turn key off. Disconnect BOO circuit harness connector. Set DVOM on 20-volt scale. Measure voltage between BOO circuit at harness connector and chassis ground while depressing brake pedal. If voltage is greater than 10 volts, repair open circuit between BOO connection to brakelight circuit and brakelight ground. If voltage is not greater than 10 volts, verify brake switch operation. If okay, repair open circuit between Batt (+) supply to circuit and BOO connection to brakelight circuit. Reconnect harness connector and repeat QUICK TEST.