E 450 V8-5.4L (2009)
Parking Lamp: Pinpoint Tests
Pinpoint Test N: One Or More Parking, Rear Or License Plate Lamps Is Inoperative
Parking, Rear and License Plate Lamps
Pinpoint Tests
Pinpoint Test N: 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
Refer to Wiring Diagram Set 140, Customer Access 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 (integral to the SJB). When the parking lamp relay is energized, voltage is routed through circuit CLS30 (VT/WH) to the rear and front parking
lamps.
For wagon, ground is provided to the rear parking and license plate lamps through circuit GD149 (BK/GY). Ground is provided to the LH front parking
and side marker lamps through circuit GD129 (BK/YE). Ground is provided to the RH front parking and side marker lamps through circuit GD131
(BK/GY).
For cutaway vehicles, ground is provided to the rear parking and license plate lamps by the body builder. Ground is provided to the LH front parking and
side marker lamps through circuit GD129 (BK/YE). Ground is provided to the RH front parking and side marker lamps through circuit GD131
(BK/GY).
For stripped chassis vehicles, ground is provided to the front and rear parking lamps by the body builder.
This pinpoint test is intended to diagnose the following:
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Fuse
-
Wiring, terminals or connectors
-
Bulb holder
-
Body builder equipment
-
SJB
PINPOINT TEST N: 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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N1 CHECK THE HAZARD LAMP OPERATION
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Ignition OFF.
-
Activate the hazard lamp function.
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Do the hazard lamps operate correctly?
Yes
GO to N2.
No
REFER to Turn Signal and Hazard Lamps See: Turn Signals/Testing and Inspection.
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