Expedition 2WD V8-5.4L (2009)
Parking Lamp: Pinpoint Tests
Pinpoint Test P: One Or More Parking, Rear Or License Plate Lamps Is Inoperative
Parking, Rear and License Plate Lamps
Pinpoint Tests
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. See: Diagrams/Electrical
Diagrams/Diagrams By Number
Normal Operation
When the headlamp switch is placed in the PARKING LAMPS ON position, the Smart Junction Box (SJB) provides a ground for the parking lamp relay
coil (integrated into the SJB). When the parking lamp relay is energized, voltage is routed through circuit CLS30 (VT/WH) to the rear and front parking
lamps. Ground is provided to the rear parking, liftgate and license plate lamps through circuits GD149 (BK/GY) and GD150 (BK/WH). Ground is
provided to the front parking and side marker lamps through circuits GD120 (BK/GN) and GD123 (BK/GY).
This pinpoint test is intended to diagnose the following:
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Fuse
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Wiring, terminals or connectors
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Bulb holder
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SJB
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
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Ignition OFF.
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Place the headlamp switch in the PARKING LAMPS ON position.
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Are all the parking lamps inoperative?
Yes
PLACE the headlamp switch in the OFF position. VERIFY the SJB fuse 22 (15A) is OK. If OK, GO to P6. If not OK, REFER to the Wiring Diagrams
to identify the possible causes of the circuit short.
No
If all the front parking lamps are inoperative, GO to P2.
If all the rear parking and license plate lamps are inoperative, GO to P3.
For all other inoperative lamps, GO to P4.
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P2 CHECK THE SJB FRONT PARKING LAMPS OUTPUT CIRCUIT FOR AN OPEN
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Disconnect: SJB C2280e.
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Connect a fused jumper wire between the SJB C2280e-1, circuit CBB56 (BU/GN), harness side and the SJB C2280e-6, circuit CLS30 (VT/WH),
harness side.
