Grand Marquis V8-4.6L Flex Fuel (2010)
Parking Lamp: Pinpoint Tests
Pinpoint Test P: One Or More Parking, Rear Or License Plate Lamps Are Inoperative
Parking, Rear and License Plate Lamps
Pinpoint Tests
Pinpoint Test P: One Or More Parking, Rear Or License Plate Lamps Are 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
The Central Junction Box (CJB) supplies voltage to the Lighting Control Module (LCM). When a request for the parking lamps is detected, the LCM
provides voltage to the parking and license plate lamps.
This pinpoint test is intended to diagnose the following:
-
Fuse
-
Wiring, terminals or connectors
-
LCM
PINPOINT TEST P: ONE OR MORE PARKING, REAR OR LICENSE PLATE LAMPS ARE 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 of the parking and license lamps inoperative?
Yes
GO to P2.
No
GO to P4.
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P2 CHECK FOR VOLTAGE TO THE LCM
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Place the headlamp switch in the OFF position.
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Disconnect: LCM C2145d.
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Measure the voltage between the LCM C2145d-23, circuit 195 (TN/WH), harness side and ground.
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Is the voltage greater than 10 volts?
Yes
GO to P3.
