Pinpoint Test P: One Or More Parking, Rear Or License Plate Lamps Is Inoperative
Parking, Rear and License Plate Lamps
Pinpoint Test P: One Or More Parking, Rear or License Plate Lamps Is Inoperative
Refer to Wiring Diagram Set 92, Parking, Rear and License Lamps for schematic and connector information. Diagrams By Number
Normal Operation
The Battery Junction Box (BJB) fuse 22 (15A) provides voltage to the Body Control Module (BCM) for the parking lamps. When the headlamp switch is placed in the PARKING LAMPS ON position, the BCM provides voltage on 5 separate circuits to the front and rear parking and license plate lamps.
If a fault exists with the headlamp switch input, the BCM faults the parking lamps and low beam headlamps on.
This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- Bulb socket
- Auxiliary parking lamp
- BCM
PINPOINT TEST P: ONE OR MORE PARKING, REAR OR LICENSE PLATE LAMPS IS INOPERATIVE
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
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P1 DETERMINE IF ALL THE PARKING LAMPS ARE INOPERATIVE
- Ignition OFF.
- Place the headlamp switch in the PARKING LAMPS ON position.
- Are all the parking lamps inoperative?
Yes
VERIFY the BJB fuse 22 (15A) is OK. If OK, GO to P2. If not OK, REFER to the Wiring Diagrams to identify the possible causes of the circuit short. Diagrams By Number
No
GO to P3.
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P2 CHECK FOR VOLTAGE TO THE BCM
- Place the headlamp switch in the OFF position.
- Disconnect: BCM C2280A.
- Measure the voltage between the BCM C2280A-7, circuit SBB22 (BN/RD), harness side and ground.
- Is the voltage greater than 10 volts?
Yes
GO to P6.
No
REPAIR circuit SBB22 (BN/RD) for an open. TEST the system for normal operation.
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P3 CHECK FOR VOLTAGE TO THE INOPERATIVE PARKING LAMP
NOTE: If the LH rear and both license plate lamps are inoperative, follow the diagnostics for the rear lamp.
- Place the headlamp switch in the OFF position.
- Disconnect: Inoperative Lamp.
- Place the headlamp switch in the PARKING LAMPS ON position.
- Measure the voltage between the inoperative lamp, harness side and ground as follows:
- Is the voltage greater than 10 volts?
Yes
For a license plate lamp, REPAIR circuit GD143 (BK/VT) for an open. TEST the system for normal operation. For all other lamps, GO to P4.
No
For a license plate lamp, REPAIR circuit CLS08 (VT/GN) for an open. TEST the system for normal operation. If an individual front side marker lamp or either front auxiliary parking lamp is inoperative, REPAIR circuit CLS12 (WH/VT) for an open. TEST the system for normal operation. For all other lamp concerns, GO to P5.
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P4 CHECK THE PARKING LAMP GROUND CIRCUIT FOR AN OPEN
- Measure the voltage between the inoperative lamp pins, harness side as follows:
- Is the voltage greater than 10 volts?
Yes
For a front parking or side marker lamp, INSTALL a new bulb socket. TEST the system for normal operation. For a front auxiliary parking lamp, INSTALL a new auxiliary parking lamp. REFER to Parking Lamp - Auxiliary Service and Repair. TEST the system for normal operation. For a rear parking lamp (4-door), INSTALL a new bulb socket. TEST the system for normal operation. For a rear parking lamp (5-door), REPAIR or INSTALL a new rear lamp harness . TEST the system for normal operation.
No
REPAIR the ground circuit in question for an open. CLEAR the DTCs. TEST the system for normal operation.
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P5 BYPASS THE BCM
NOTE: If both LH (front and rear) or RH (front and rear) lamps are inoperative, the test must be checked at both lamps to eliminate the circuitry as the cause of the concern.
NOTE: If the fuse in the jumper wire fails, refer to the Wiring Diagrams to identify the possible causes of the circuit short. After the repair, cycle the ignition to reset the driver within the BCM. Test the system for normal operation. Diagrams By Number
- Disconnect: BCM C2280C (Front Side Marker Lamps).
- Disconnect: BCM C2280D (Front Parking Lamps).
- Disconnect: BCM C2280G (Rear Parking Lamps).
- For the front side marker lamps, connect a fused jumper wire between the BCM C2280C-14, circuit CLS12 (WH/VT), harness side and battery positive.
- For a front parking lamp, connect a fused jumper wire between the BCM C2280D-24 (LH), circuit CLS06 (GN/OG), harness side and battery positive; or between the BCM C2280D-23 (RH), circuit CLS07 (BN/YE), harness side and battery positive.
- For a rear parking lamp, connect a fused jumper wire between the BCM C2280G-13 (LH), circuit CLS08 (VT/GN), harness side and battery positive; or between the BCM C2280G-1 (RH), circuit CLS09 (WH/OG), harness side and battery positive.
- Does the parking lamp(s) in question illuminate?
Yes
REMOVE the jumper wire. GO to P6.
No
REMOVE the jumper wire. REPAIR the parking lamp voltage supply circuit in question for an open. CLEAR the DTCs. TEST the system for normal operation.
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P6 CHECK FOR CORRECT BCM OPERATION
- Disconnect all the BCM connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the BCM connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
Yes
INSTALL a new BCM. REFER to Multifunction Electronic Modules Body Control Module (BCM). TEST the system for normal operation.
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
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