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Circuit Description
The EBCM illuminates the ABS indicator by applying ground to the ABS indicator failure control circuit. Ground may also be applied to the ABS indicator failure control circuit by the electronic brake control lamp relay. This occurs if the ground circuit between the EBCM and the electronic brake control lamp relay becomes open.

Diagnostic Aids
Thoroughly inspect connections or circuitry that may cause an intermittent malfunction. Refer to Testing for Intermittent and Poor Connections, Wiring Repairs and Connector Repairs.

Test Description

The numbers below refer to the step numbers on the diagnostic table.
4. This step tests for a poor connection to the EBCM or a faulty EBCM.
5. This step tests if the electronic brake control lamp relay is applying ground to the ABS indicator failure control circuit.