Circuit/System Testing
WARNING: This page is about a different car, the 2008 Isuzu i-370, 2008 Isuzu i-290, 2008 GMC Canyon, and 2008 Chevrolet Colorado. However, it is still accessible from the selected car via links, so may be relevant.
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.