J1 Check Brake Lamp Switch

- Connect 60-Pin Breakout Box 014-00322 with Anti-Lock Brake Adapter 007-00116 or equivalent to the anti-lock brake wiring connector on the headlamp dash panel junction wire harness.

- Turn the ignition switch to the RUN position.

- Measure voltage between breakout box pins 20 and 13.

NOTE: Do not apply brake pedal while performing this test.

- Is B+ present?

YES -- Replace brake lamp switch or service cable harness circuit 511.

NO -- Go to J2. J2 Check Traction Assist Valve