F9 Check Circuit 570 (BK/W) For Open

NOTE: Connector pin 22 is shorted to pin 21 when connector is disconnected from anti-lock brake control module.

- Disconnect connector from anti-lock brake control module.

- Connect Rotunda EEC-IV 60-pin Breakout Box 014-00322 with Rotunda Anti-Lock Brake Adapter 007-00116 or equivalent to wiring harness connector.

- Disconnect instrument cluster Connector C2.

- Using an ohmmeter, measure resistance between breakout box pin 21, circuit 570 (BK/W) and a known good ground.

- Using an ohmmeter, measure resistance between breakout box pin 1, circuit 570 (BK/W) and a known good ground.

- Is resistance less than 5 ohms?

YES -- Go to F10. F10 Check Circuit 603 (DG) For Open

NO -- Service circuit 570 (BK/W) for open. Restore vehicle. Retest system.