Test A: The Control Illumination Is Inoperative

PINPOINT TEST A: THE CONTROL ILLUMINATION IS INOPERATIVE

A1-A3:

A3-A4:

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.

Possible Causes
- Fuse(s)
- Circuit 484 (OG/BK) open or short to ground
- Circuit 676 (PK/OG) open
- Circuit 905(GY/LB) open
- LCM