Navigator 4WD V8-5.4L (2010)
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Is the voltage greater than 10 volts?
Yes
REPAIR circuit CAT11 (BN) for an open. TEST the system for normal operation.
No
REPAIR circuit GD123 (BK/GY) for an open. TEST the system for normal operation.
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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
Normal Operation
The Battery Junction Box (BJB) fuse 58 (15A) receives voltage when the vehicle reversing lamps are illuminated. The voltage is then routed to the
trailer tow connector.
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
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 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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Ignition OFF.
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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 pin 7, circuit CAT16 (GY/BN), component side and ground.
