Test A: The Courtesy Lamps Are Inoperative

PINPOINT TEST A: THE COURTESY LAMPS ARE INOPERATIVE

Normal Operation
The instrument cluster (IC) monitors the door ajar switch status on circuits 159 (RD/PK), 1034 (BK/WH) and 628 (WH) for a ground supplied through the ajar switches by circuit 57 (BK), indicating an open door. The IC then grounds circuits 1005 (VT/OG) and 1008 (LG/OG), energizing the battery saver relay and the interior lamp relay. When the relays are energized, voltage is supplied to the interior lamp circuits.

- DTC B1373 (Illuminated Entry Relay Short To Battery) - is a continuous and on-demand DTC that sets when the IC detects a short to voltage on the courtesy lamp relay drive output circuit.

This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- Interior lamp relay
- IC

A1-A4:

A4-A6:

A7-A9:

A9-A10: