F 250 4WD Super Duty V8-5.4L (2009)
Z6 CHECK FOR VOLTAGE TO CHECK THE TRAILER TOW STOP/TURN RELAY USING THE GROUND CIRCUIT
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For the LH trailer turn lamp, measure the voltage between the trailer tow LH stop/turn relay pin 3, BJB face side and the trailer tow LH stop/turn
relay pin 2, circuit GD122 (BK), BJB face side.
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Measure the voltage between the trailer tow RH stop/turn relay pin 3, BJB face side and the trailer tow RH stop/turn relay pin 2, circuit GD122
(BK), BJB face side.
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Is the voltage greater than 10 volts?
Yes
REPAIR circuit GD122 (BK) for an open. TEST the system for normal operation.
No
REPAIR circuit CAT06 (YE) (LH trailer stop/turn) or circuit CAT09 (GN) (RH trailer stop/turn) for an open. TEST the system for normal operation.
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Pinpoint Test AA: The Trailer Lamps Are Inoperative - Trailer Parking Lamps
Trailer Lamps
Pinpoint Tests
Pinpoint Test AA: The Trailer Lamps Are Inoperative - Trailer Parking Lamps
Refer to Wiring Diagram Set 95, Trailer/Camper Adapter for schematic and connector information. See: Diagrams/Electrical Diagrams/Diagrams By
Number