Test D: The Audio System Illumination Is Inoperative

PINPOINT TEST D: THE AUDIO SYSTEM ILLUMINATION IS INOPERATIVE

Normal Operation
Variable voltage is supplied to the audio unit from the instrument panel dimmer switch on circuit VLN18 (BU/WH). The audio unit is grounded through circuit GD161 (BK/YE).

This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Audio unit

D1-D2: