F 350 2WD Super Duty V10-6.8L (2009)
REPAIR circuit GD122 (BK) for an open. TEST the system for normal operation.
No
GO to Y2.
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Y2 CHECK THE TRAILER TOW GROUND CIRCUIT FOR CONTINUITY TO GROUND
-
Disconnect: Negative Battery Cable.
-
Measure the resistance between the trailer tow connector ground supply pins, circuit RAT08 (WH), component side and ground.
-
Is the resistance less than 5 ohms?
Yes
The vehicle is operating correctly. SEND the trailer to an authorized camper/trailer repair facility.
No
GO to Y3.
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Y3 CHECK THE TRAILER TOW GROUND CIRCUIT FOR AN OPEN
-
Disconnect: Trailer Tow C4099.
-
Measure the resistance between the trailer tow C4099-2, circuit RAT08 (WH), harness side and ground.
-
Is the resistance less than 5 ohms?
Yes
INSTALL a new trailer tow connector. TEST the system for normal operation.
No
REPAIR circuit RAT08 (WH) for an open. TEST the system for normal operation.
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Pinpoint Test Z: The Individual Trailer Lamp Is Inoperative - Trailer Stop/Turn Lamp
Trailer Lamps
Pinpoint Tests
Pinpoint Test Z: The Individual Trailer Lamp Is Inoperative - Trailer Stop/Turn Lamp
Refer to Wiring Diagram Set 95, Trailer/Camper Adapter for schematic and connector information. See: Diagrams/Electrical Diagrams/Diagrams By
Number
Refer to Wiring Diagram Set 11, Fuse and Relay Information for schematic and connector information. See: Diagrams/Electrical Diagrams/Diagrams By
Number
