Symptom Chart

SYMPTOM CHART

Condition	Possible Sources	Action
No communication with the smart junction box (SJB)	Fuse(s) Circuitry SJB	REFER to MULTIFUNCTION ELECTRONIC MODULES
The control illumination is inoperative	Smart junction box (SJB)	GO to PINPOINT TEST A .
The instrument cluster illumination is inoperative	Circuitry Instrument cluster	CHECK the operation of other backlighting components. If the other backlighting components operate correctly, INSTALL a new instrument cluster. REFER to INSTRUMENT CLUSTER . TEST the system for normal operation. If other backlighting components are inoperative, GO to PINPOINT TEST A .
The instrument panel illumination does not dim	Circuitry Instrument panel dimmer switch Smart junction box (SJB)	GO to PINPOINT TEST B .
One or more smart junction box (SJB) controlled illumination source(s) is inoperative	Fuse Circuitry Illuminated component Clockspring SJB Accessory delay relay Speed control switch	GO to PINPOINT TEST C .