Mountaineer AWD V8-4.6L (2010)
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AC3 CHECK THE TRAILER TOW CONNECTOR
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Ignition OFF.
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Disconnect: Trailer Tow C473.
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Ignition ON.
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Measure the voltage between the trailer tow C473-5, circuit CAT14 (OG) and ground.
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Is the voltage greater than 10 volts?
Yes
INSTALL a new trailer tow connector. TEST the system for normal operation.
No
GO to AC4.
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AC4 CHECK FOR VOLTAGE TO THE TRAILER BATTERY CHARGE RELAY COIL
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Ignition OFF.
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Disconnect: Trailer Battery Charge Relay.
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Ignition ON.
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Measure the voltage between the trailer battery charge relay pin 86, circuit CBP12 (GN/WH), BJB face side and ground.
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Is the voltage greater than 10 volts?
Yes
GO to AC6.
No
VERIFY the SJB fuse 12 (5A) is OK. If OK, GO to AC5. If not OK, REFER to the Wiring Diagrams to identify the possible causes of the circuit short.
See: Diagrams/Electrical Diagrams/Diagrams By Number
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AC5 CHECK THE BATTERY CHARGE RELAY COIL VOLTAGE CIRCUIT FOR AN OPEN
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Ignition OFF.
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Disconnect: SJB C2280e.
