Lighting Control Module

The lighting control module (LCM) is located under the instrument panel to the right of the steering column. The LCM provides diagnostic services to the New Generation Star (NGS) tester through the Light Blue/White wire. A failure of the Light Blue/White wire may result in the inability of the NGS tester to communicate to the module. In the event the NGS tester fails to communicate, diagnose by symptom. See SYMPTOM INDEX  table under SYSTEM TESTS.