Circuit/System Testing

Disconnect the EBCM harness connector. Connect a test lamp to ground, at the EBCM harness connector touch the test lamp probe to each of the 3 battery positive voltage circuits. The test lamp should illuminate on all 3 circuits.

• If the test lamp does not illuminate on one of the battery positive voltage circuits, repair open or short to ground on the suspected circuit.

Connect a test lamp to battery positive voltage, at the EBCM harness connector touch the test lamp probe to each of the 3 ground circuits. The test lamp should illuminate on all 3 circuits.

• If the test lamp does not illuminate on one of the ground circuits, repair open or short to voltage on the suspected circuit.
• If no wiring faults can be found, replace the EBCM/brake pressure modulator valve (BPMV) assembly.