Test Q: One Or More Parking, Rear Or License Plate Lamps Is Inoperative

PINPOINT TEST Q: ONE OR MORE PARKING, REAR OR LICENSE PLATE LAMPS IS INOPERATIVE

Q1-Q4:

Q4-Q6:

Q6 Continued:

Q6-Q7:

Q7-Q8:

Normal Operation
Voltage is supplied to the smart junction box (SJB) from the battery junction box (BJB) fuse 23 (60A) through circuit SBB23 (WH/RD).

When the headlamp switch is placed in the PARKING LAMPS ON position, the SJB provides a ground for the parking lamp relay coil (internal to the SJB). When the parking lamp relay is energized, voltage is sent through circuit CBP08 (GY/YE) to the rear and front parking lamps. Ground is provided to the rear parking and license plate lamps through circuit GD171 (BK/GY). Ground is provided to the front parking and side marker lamps through circuits GD121 (BK/GY), GD121 (BK/RD), GD121 (BK/YE), GD121 (GY/YE), GD123 (BK/YE) or GD123 (BK/GY).

Possible Causes
- Fuse
- Circuit CBP08 (GY/YE) open
- Circuit GD121 (BK/GY) open
- Circuit GD121 (BK/RD) open
- Circuit GD121 (BK/YE) open
- Circuit GD121 (GY/YE) open
- Circuit GD123 (BK/YE) open
- Circuit GD123 (BK/GY) open
- Circuit GD171 (BK/GY) open
- Circuit SBB23 (WH/RD) open
- Rear lamp assembly
- SJB