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Test L: The Courtesy Lamps Do Not Turn On With The Liftgate Open
PINPOINT TEST L: THE COURTESY LAMPS DO NOT TURN ON WITH THE LIFTGATE OPENL1-L4:
Normal Operation
When the liftgate is opened, the ajar switch (or power liftgate module, if equipped) opens the circuit to the smart junction box (SJB). The SJB monitors the ajar circuit, and based on the ajar status, the SJB supplies voltage to the courtesy lamps on circuit VLN33 (GY/VT).
DTC B2721 - sets when the power liftgate module detects a short to ground from the SJB, or liftgate ajar circuit.
Possible Causes
- Circuitry
- Liftgate ajar switch
- Power liftgate module
- SJB