Test A: The Courtesy Lamps Are Inoperative

PINPOINT TEST A: THE COURTESY LAMPS ARE INOPERATIVE

A1-A4:

A4-A6:

A6-A7:

Normal Operation
Power is supplied to the courtesy lamps through the smart junction box (SJB) fuse 23 (15A), which supplies voltage to the courtesy lamps/demand lamps solid-state relay in the SJB. When any door, liftgate or liftgate glass is opened, the ajar switch opens, signaling the SJB. The SJB monitors the ajar circuits, and based on the ajar status, the SJB will energize the solid-state relay supplying voltage to the courtesy lamps on circuit CLN03 (YE/GY). Ground for the courtesy lamps is supplied through either circuit GD133 (BK) or circuit GD149 (BK/GY).

DTC B1374 - sets when the SJB detects a short to ground on the illuminated entry relay circuit.

Possible Causes
- Fuse
- Circuit CLN01 (GN/VT) short to ground
- Circuit CLN03 (YE/GY) open or short to ground
- Circuit CLN15 (GY/YE) short to ground
- SJB