Diesel Data: Automotive Repair

Test N: One Or More Parking, Rear Or License Plate Lamp Is Inoperative

PINPOINT TEST N: ONE OR MORE PARKING, REAR OR LICENSE PLATE LAMP IS INOPERATIVE

Normal Operation
The smart junction box (SJB) sends a voltage reference signal to the headlamp switch through circuit 1401 (BK/LG). When the headlamp switch is placed in the PARKING LAMPS ON position, the SJB provides voltage to the parking, rear, license plate and side marker lamps. The lamps are grounded through circuit 1205 (BK).







This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Bulb holder
- BEC
- SJB


N1-N4:






N4-N6:






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N10-N12: