Stoplight Switch Circuit

Ensure stoplights operate when brake pedal is pressed. Do not disconnect ABS ECU connectors. Backprobe connector to measure voltage. Measure voltage between ground and terminal No. 6 on connector A11. If battery voltage is present, stoplight switch circuit is okay. If battery voltage is not present, inspect and repair circuit between stoplight switch and ABS ECU. If circuit is okay, replace ABS ECU.