Four Wheel Anti-Lock Brake System (4WABS)

H4 BEGIN INTERMITTENT DIAGNOSIS

- Key "OFF."

- Install the EEC IV 60-Pin Breakout Box.

- Measure the resistance between pins 9 and 21 of the breakout box.

Is the resistance greater than 1500 ohms?

> Yes
Replace the rear brake anti-lock sensor. H9

> No
Repair circuit 519 (LG/BK) or circuit 523 (R/PK). H9