3. Check The Stop Lamp Switch Circuit
- Check that stop lamp lights up when brake pedal is depressed and turns off when brake pedal is released.
- Measure the voltage between terminal 18 of the ABS control module harness side connector (E37) and body ground when brake pedal is depressed.
- Specification: approximately B+
Is the voltage within specification?
Yes: Go to the next step.
No: Repair the stop lamp switch. Repair an open in the wire between the ABS control module and the stop lamp switch.