Explorer 4WD V6-4.0L (2009)
For the 4-pin connector, REPAIR the circuit. TEST the system for normal operation.
For the 7-pin connector, GO to W2.
-------------------------------------------------
W2 CHECK CIRCUIT RAT08 (WH) FOR AN OPEN
-
Disconnect: Trailer Tow C473.
-
Measure the resistance between the trailer tow C473-2, 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 the circuit. TEST the system for normal operation.
-------------------------------------------------
Pinpoint Test X: The Trailer Lamps Are Inoperative - Parking Lamps
Trailer Lamps
Pinpoint Tests
Pinpoint Test X: The Trailer Lamps Are Inoperative - Parking Lamps
Refer to Wiring Diagram Set 95, Trailer/Camper Adapter for schematic and connector information. See: Diagrams/Electrical Diagrams/Diagrams By
Number
Normal Operation
When the vehicle parking lamps are on, the Smart Junction Box (SJB) provides voltage to the trailer parking lamps through circuit CAT17 (BN).
This pinpoint test is intended to diagnose the following:
-
Fuse
-
Wiring, terminals or connectors
-
Trailer tow connector
-
Trailer
-
SJB
PINPOINT TEST X: THE TRAILER LAMPS ARE INOPERATIVE - PARKING 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.
-------------------------------------------------
X1 CHECK FOR VOLTAGE TO THE TRAILER TOW CONNECTOR
-
Ignition OFF.
-
Disconnect the trailer from the vehicle.
-
Place the headlamp switch in the PARKING LAMPS ON position.
-
For the 4-pin connector, measure the voltage between the trailer tow C439-3, circuit CAT17 (BN), harness side and ground.
