Component Tests and General Diagnostics
Indicator FailureDoes not prove out:
1. Connect EEC-IV 60-Pin Breakout Box to the anti-lock brake control module with ABS Adapter Cable.
2. Connect EEC-IV 60-Pin Breakout Box Pin 1, Circuit 603 (DG) (yellow indicator) or Pin 4, Circuit 128 (VT/YE) (red indicator) to the ground pin with a 1OA in-line fuse.
3. Wiggle the wire harness at several points between the anti-lock brake control module and instrument cluster.
4. Repair/install a new wire harness at the location that the indicator flickered off (yellow indicator) or on (red indicator) for an open circuit.
Sensor Failure
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.
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 the harness for an open circuit.
1. NOTE: Connect the jumper securely to the suspect anti-lock brake sensor connector.
Connect a jumper between the two pins on the suspect anti-lock brake 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.
3. Drive over rough roads at various speeds.
4. If there is an open circuit detected between the pins, repair the circuit(s) for an open circuit.
5. Check the suspect anti-lock brake sensor pigtail.
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 connector.
2. If the resistance is above specification, 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 pins (component side) while wiggling the connector.
4. If the resistance is below specification, install a new 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 pin (component side) and ground on the highest resistance scale of the meter while wiggling the connector.
6. If the meter shows anything but an open circuit, install a new anti-lock brake sensor.