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

PINPOINT TEST F: 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. When the instrument panel dimmer switch is rotated to the dome detent, ground is supplied to circuit CLN28 (GN/BU). Based on the instrument panel dimmer switch status, the SJB supplies voltage to the courtesy lamps through circuit VLN33 (GY/VT).

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

F1-F4:

F4-F5: