F 150 4WD V8-5.4L Flex Fuel (2008)
Q4-Q5
Test R: The Parking, Rear Or License Plate Lamps Are On Continuously
PINPOINT TEST R: THE PARKING, REAR OR LICENSE PLATE LAMPS ARE ON CONTINUOUSLY
Normal Operation
The headlamp switch is supplied voltage through circuit 195 (TN/WH). When the headlamp switch is placed in the PARKING LAMPS ON position,
the headlamp switch supplies voltage to circuit 14 (BN), which then supplies voltage to the exterior lamps.
When the vehicle security module (VSM) receives a command to turn the parking lamps on, the VSM provides voltage through circuit 14 (BN) to the
parking lamps.
This pinpoint test is intended to diagnose the following:
-
Wiring, terminals or connectors
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Headlamp switch
-
VSM
