Four Wheel Anti-Lock Brake System (4WABS)

1. Connect EEC-IV 60-Pin Breakout Box to the anti-lock brake control module with ABS Adapter Cable.
2. Disconnect the suspect anti-lock brake sensor.
3. Check the harness for short to ground.





1 NOTE: Use 88 Digital Multimeter with the minimum resistance hold feature enabled for this test.
Monitor the resistance between EEC-IV 60-Pin Breakout Box pins and ground as follows:

2 Drive over rough roads at various speeds.
3 If there is continuity between either circuit and ground, repair the circuit for a short to ground.

4. Check harness for open circuit.
1 NOTE: Connect jumper securely to the suspect sensor connector.

Connect a jumper between the two pins on the suspect sensor connector.

2 NOTE: Use 88 Digital Multimeter with the maximum resistance hold feature enabled for this test.





Monitor the resistance between EEC-IV 60-Pin Breakout Box pins as follows:
3 Drive over rough roads at various speeds.
4 If there is an open circuit detected between pins, repair the circuit(s) for an open circuit.

5. Check suspect sensor electrical connector.

1 NOTE: Use 88 Digital Multimeter with the maximum resistance hold feature enabled for this test.





Monitor the resistance between suspect anti-lock brake sensor terminals while wiggling the electrical connector:
2 If the resistance is above specifications, replace the anti-lock brake sensor.

3 NOTE: Use 88 Digital Multimeter with the minimum resistance hold feature enabled for this test.





Monitor the resistance between suspect anti-lock brake sensor terminals while wiggling the electrical connector:
4 If the resistance is below specifications, replace the anti-lock brake sensor.

5 NOTE: Use 88 Digital Multimeter with the minimum resistance hold feature enabled for this test.

Monitor the resistance between an anti-lock brake sensor terminal and ground on the highest resistance scale of the meter while wiggling the electrical connector.
6 If the meter shows anything but open circuit, replace the anti-lock brake sensor.