Test A: The Control Illumination Is Inoperative

PINPOINT TEST A: THE CONTROL ILLUMINATION IS INOPERATIVE

Normal Operation
The lighting control module (LCM) receives voltage from the central junction box (CJB) on circuit 54 (LG/YE). With the parking lamps on, the LCM generates a variable pulse width modulated (PWM) voltage which is distributed to the dimmable components on circuit 484 (OG/BK). The driver door module (DDM) generates a variable voltage which it distributed to the electronic automatic temperature control (EATC) module and the overhead console with moonroof on circuit 19 (LB/RD). Light intensity is adjusted by rotating the instrument panel dimmer switch.

This pinpoint test is intended to diagnose the following:
- Fuse(s)
- Wiring, terminals or connectors
- LCM

A1:

A2-A4: