Test B: The Auxiliary Climate Control Illumination Is Inoperative

PINPOINT TEST B: THE AUXILIARY CLIMATE CONTROL ILLUMINATION IS INOPERATIVE

B1-B3:

B3-B4:

Normal Operation
The smart junction box (SJB) supplies a pulse-width modulated (PWM) voltage to the auxiliary climate control illumination on circuit CLN04 (BU/BN). Ground for the auxiliary climate control illumination is through circuit GD149 (BK/GY).

Possible Causes
- circuit CLN04 (BU/BN) open or short to ground
- circuit GD149 (BK/GY) open
- auxiliary climate control
- SJB