Pinpoint Test 2

PINPOINT TEST 2: THE PARKING, REAR OR LICENSE PLATE LAMPS ARE ON CONTINUOUSLY

Normal Operation
The smart junction box (SJB) monitors the parking lamp request input from the main light switch through circuit (L/GY). The SJB provides a ground for the parking lamp relay coil (integral to the SJB) when a request for the parking lamps is received. When the parking lamp relay is energized, voltage is routed through circuit (V/W) to the rear and front parking lamps.
- DTC B1578 (Lamp Park Input Circuit Short to Ground) - is an on-demand DTC that sets when the SJB detects a short to ground in the parking lamps on input circuit.

Possible Causes
- Wiring, terminals or connectors
- Main light switch
- SJB

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