D2 Check ABS Brake Pedal Sensor Switch and Circuitry

- Turn ignition switch to OFF position.

Anti-Lock Control Module:

- Disconnect anti-lock brake wiring plug from anti-lock brake control module.

Breakout Box:

- Connect EEC-IV Breakout Box 014-00322 with Anti-Lock Test Adapter T90P-50-ALA or equivalent to the anti-lock brake wiring plug on the front brake anti-lock sensor harness.

- Check continuity between breakout box pins 5 and 26.

- Is continuity present?

YES -- Go to D4. D4 Check ABS Brake Pedal Sensor Switch Function

NO -- Go to D3. D3 Check Brake Pedal Sensor Switch