Explorer 4WD V6-4.0L (2009)
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Is any voltage present?
Yes
REPAIR the circuit in question. TEST the system for normal operation.
No
GO to AB3.
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AB3 CHECK FOR CORRECT SJB OPERATION
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Disconnect all the SJB connectors.
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Check for:
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corrosion
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damaged pins
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pushed-out pins
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Connect all the SJB connectors and make sure they seat correctly.
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Operate the system and verify the concern is still present.
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Is the concern still present?
Yes
INSTALL a new SJB. CLEAR any DTCs. REPEAT the self-test.
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
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Pinpoint Test AC: The Trailer Battery Charging Is Inoperative/Does Not Operate Correctly
Trailer Lamps
Pinpoint Tests
Pinpoint Test AC: The Trailer Battery Charging Is Inoperative/Does Not Operate Correctly
Refer to Wiring Diagram Set 95, Trailer/Camper Adapter for schematic and connector information. See: Diagrams/Electrical Diagrams/Diagrams By
Number
Normal Operation
The trailer battery charge relay coil receives voltage from the Smart Junction Box (SJB) fuse 12 (5A) through circuit CBP12 (GN/WH) when the ignition
switch is in the RUN or ACC position. Ground for the trailer battery charge relay coil is supplied through circuit GD120 (BK/GN). The Battery Junction
Box (BJB) fuse 13 (30A) supplies voltage to the trailer battery charge relay switch through circuit SSB13 (GY/RD). When the trailer battery charge
relay is energized, the voltage is routed to the trailer tow connector through circuit CAT14 (OG).
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 battery charge relay
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Trailer tow connector
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Trailer
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SJB
