F 350 2WD Super Duty V10-6.8L (2009)
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E5 CHECK THE TBC MODULE GROUND CIRCUIT FOR AN OPEN
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Ignition OFF.
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Measure the resistance between TBC module C2124-11, circuit GD115 (BK/GY), harness side and ground.
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Is the resistance less than 5 ohms?
Yes
GO to E6.
No
REPAIR circuit GD115 (BK/GY). CLEAR the DTCs. REPEAT the self-test.
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E6 CHECK FOR CORRECT TBC MODULE OPERATION
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Check the TBC module connector for:
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corrosion.
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pushed-out pins.
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spread terminals.
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Connect the TBC module connector and make sure that it is seated correctly.
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Operate the system and verify the concern is still present.
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Is the concern still present?
Yes
INSTALL a new TBC module. REFER to Trailer Brake Control (TBC) Module See: Service and Repair. CLEAR the DTCs. REPEAT the self-test.
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the
self-test.
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Pinpoint Test F: The Message Center Displays Wiring Fault On Trailer
Auxiliary Brake System - Trailer Brake Control (TBC) Module
Pinpoint Tests
Pinpoint Test F: The Message Center Displays WIRING FAULT ON TRAILER
NOTE: Carry out all pinpoint tests without a trailer connected to the vehicle.
Refer to Wiring Diagram Set 95, Trailer/Camper Adapter for schematic and connector information. See: Diagrams/Electrical Diagrams/Diagrams By
Number
Normal Operation
The braking energy that is provided to the trailer is varied with a Pulse Width Modulated (PWM) signal along circuit CAT19 (BU) that switches between
0 volt and battery voltage, the higher the duty cycle the more braking power available. The Trailer Brake Control (TBC) module varies the PWM signal
based on various inputs such as the brake pressure transducer, the manual slider switch and the gain buttons. With the vehicle stationary and with the
