Test J: The Courtesy Lamps Are Inoperative From The Instrument Panel Dimmer Switch

PINPOINT TEST J: THE COURTESY LAMPS ARE INOPERATIVE FROM THE INSTRUMENT PANEL DIMMER SWITCH

Normal Operation
The smart junction box (SJB) monitors the instrument panel dimmer switch status on circuit CLN28 (GN/BU) to determine if the courtesy lamps are requested. Based on the instrument panel dimmer switch status, the SJB supplies voltage to the courtesy lamps through circuit CLN26 (BU).

This pinpoint test is intended to diagnose the following:
- Dimmable backlighting illumination system concern
- Wiring, terminals or connectors
- Instrument panel dimmer switch
- SJB

J1-J3:

J3-J4: