Diagnostic Aids

An intermittent may be caused by a poor connection, rubbed-through wire insulation or a broken wire inside insulation. Inspect VCM harness connectors for backed-out terminals, improper mating, broken locks, improperly formed or damaged terminals, poor terminal-to-wire connection, and damaged harness.

If connections and harness are okay, using DVOM connected between affected terminals and ground, monitor voltage while wiggling related connectors and wiring harness. If a failure is induced, voltage will change. A change in voltage will assist in isolating location of fault.