Mountaineer AWD V8-4.6L (2010)
Yes
GO to Z5.
No
INSTALL a new trailer tow connector. TEST the system for normal operation.
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Z5 CHECK THE LH TRAILER STOP/ TURN LAMP CIRCUIT FOR A SHORT TO GROUND
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Ignition OFF.
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Disconnect: SJB C2280a.
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Measure the resistance between the SJB C2280a-14, circuit CAT06 (YE), harness side and ground.
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Is the resistance greater than 10,000 ohms?
Yes
GO to Z9.
No
REPAIR circuit CAT06 (YE) for a short to ground. RUN the on-demand self-test (required to clear certain DTCs). CORRECT any unresolved DTCs.
CLEAR all DTCs. TEST the system for normal operation.
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Z6 CHECK FOR VOLTAGE TO THE TRAILER TOW CONNECTOR
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Disconnect the trailer from the vehicle.
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Ignition OFF.
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For the 4-pin connector, while applying the brake pedal, measure the voltage between the trailer tow C439-2, circuit CAT06 (YE), harness side
and ground.
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For the 7-pin connector, while applying the brake pedal, measure the voltage between the trailer tow connector pin 1, circuit CAT06 (YE),
component side and ground.
-
Is the voltage greater than 10 volts?
Yes
The vehicle is operating correctly. SEND the trailer to an authorized camper/trailer repair facility. TEST the system for normal operation.
