Explorer 4WD V8-4.6L (2008)
AB1-AB3
Tests AC: The Trailer Battery Charging Is Inoperative/Does Not Operate Correctly
PINPOINT TEST AC: THE TRAILER BATTERY CHARGING IS INOPERATIVE/DOES NOT OPERATE CORRECTLY
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