Flex AWD V6-3.5L (2009)
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Measure the resistance between the trailer tow parking lamp relay pin 2, circuit GD120 (BK/GN), harness side and ground.
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Is the resistance less than 5 ohms?
Yes
GO to Y3.
No
REPAIR circuit GD120 (BK/GN) for an open. TEST the system for normal operation.
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Y3 CHECK FOR CONTINUITY TO GROUND THROUGH THE TRAILER TOW CONNECTOR
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Measure the resistance between the trailer tow connector ground supply pins, circuit RAT08 (WH), component side and ground.
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Is the resistance less than 5 ohms?
Yes
The vehicle is operating correctly. SEND the trailer to an authorized camper/trailer repair facility.
No
GO to Y4.
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Y4 CHECK THE TRAILER TOW GROUND CIRCUIT FOR AN OPEN
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Disconnect: Trailer Tow C4099.
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Measure the resistance between the trailer tow C4099-2, circuit RAT08 (WH), harness side and ground.
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Is the resistance less than 5 ohms?
Yes
INSTALL a new trailer tow connector. TEST the system for normal operation.
No
REPAIR circuit RAT08 (WH) for an open. TEST the system for normal operation.
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Pinpoint Test Z: The Individual Trailer Lamp Is Inoperative - Stop/Turn Lamp
