F 350 2WD Super Duty V8-6.4L DSL Turbo (2009)
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Pinpoint Test AB: The Trailer Lamps Are Inoperative - Trailer Reversing Lamps
Trailer Lamps
Pinpoint Tests
Pinpoint Test AB: The Trailer Lamps Are Inoperative - Trailer Reversing Lamps
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
Normal Operation
The Battery Junction Box (BJB) fuse 63 (15A) receives voltage from circuit CLS10 (GY/BN) when the vehicle reversing lamps are illuminated. The
voltage is then routed to the trailer tow connector through circuit CAT03 (GY/BN).
This pinpoint test is intended to diagnose the following:
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Fuse
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Wiring, terminals or connectors
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Trailer tow connector
-
Trailer
PINPOINT TEST AB: THE TRAILER LAMPS ARE INOPERATIVE - TRAILER REVERSING LAMPS
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the
connector.
NOTE: Before beginning diagnostics, visually inspect the trailer tow connector mounted on the bumper for signs of corrosion or damage. Repair or
install a new trailer tow connector as required.
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AB1 CHECK FOR VOLTAGE THROUGH THE TRAILER TOW CONNECTOR
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Apply the parking brake.
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Ignition ON.
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Select REVERSE.
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Measure the voltage between the trailer tow connector reversing lamp voltage supply pin, circuit CAT03 (GY/BN), component side and ground.
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Is the voltage greater than 10 volts?
Yes
The vehicle is operating correctly. SEND the trailer to an authorized camper/trailer repair facility.
No
GO to AB2.
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AB2 CHECK FOR VOLTAGE TO THE TRAILER TOW CONNECTOR (VEHICLE HARNESS)
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Ignition OFF.