A3 - Anti-Lock Electronic Control Module Ground

A3 ANTI-LOCK ELECTRONIC CONTROL MODULE GROUND

NOTE: When checking resistance in the anti-lock system, always disconnect the battery to starter relay cable. Improper resistance may occur with the vehicle battery connected.

- Check for good anti-lock electronic control module ground:
- Disconnect the battery to starter relay cable.
- Remove the harness connector from anti-lock electronic control module.
- Set the multimeter on the 200 ohm scale.
- Check for resistance between harness connector pin 4 and chassis ground.

Is the resistance less than 1.0 ohms?

> Yes
Reconnect the battery ground cable. Go to Pinpoint Test A4. [1][2]A4 - Rear ABS Light Power

> No
Check for an open in the anti-lock electronic control module ground wire. Check for loose, dirty or broken connector pins. Repair as necessary. Repeat the System Precheck.