Expedition 2WD V8-5.4L (2009)
Yes
REPAIR circuit CAT06 (YE) for an open. TEST the system for normal operation.
No
REPAIR circuit GD123 (BK/GY) for an open. TEST the system for normal operation.
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Z8 CHECK FOR VOLTAGE THROUGH THE TRAILER TOW CONNECTOR (RH TRAILER STOP/TURN LAMP)
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For the 4-pin connector, while applying the brake pedal, measure the voltage between the trailer tow C4098-1, circuit CAT09 (GN), 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 4, circuit CAT09 (GN),
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.
No
For the 4-pin connector, GO to Z10.
For the 7-pin connector, GO to Z9.
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Z9 CHECK FOR VOLTAGE TO THE TRAILER TOW CONNECTOR (RH STOP/TURN 7-PIN)
-
Disconnect: Trailer Tow C4099.
-
While applying the brake pedal, measure the voltage between the trailer tow C4099-4, circuit CAT09 (GN), harness side and ground.
-
Is the voltage greater than 10 volts?
Yes
INSTALL a new trailer tow connector. TEST the system for normal operation.
No
GO to Z10.