Check Brake Switch
- Measure voltage between pins No. 4 and 10 of servo connector. If battery voltage exists, replace brake switch. If battery voltage does not exist, go to next step.
- Measure voltage between pins No. 4 and 10 at servo while depressing brake pedal. If battery voltage is present, go to next step. If battery voltage is not present, replace BOO switch or repair brakelight circuit.