F 550 2WD Super Duty V10-6.8L (2009)
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Is the resistance less than 5 ohms?
Yes
GO to G7.
No
REPAIR circuit CAT19 (BU). CLEAR the DTCs. REPEAT the self-test.
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G7 CHECK THE TBC MODULE FOR MAXIMUM OUTPUT
NOTE: Battery voltage must be greater than 10 volts.
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Ignition OFF.
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Connect: TBC Module C2142.
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Ignition ON.
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NOTE: If the manual slider switch is held to the full left position for more than 5 minutes, the TBC module will automatically shut down.
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Have an assistant press the manual slider switch fully to the left with a gain of 10 on the TBC module.
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Measure the voltage between trailer tow C4099-3, circuit CAT19 (BU), harness side and ground.
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Is the voltage greater than 10-12 volts?
Yes
The TBC module is operating correctly. SEND the trailer to an authorized camper/trailer repair center for an overload condition.
No
GO to G8.
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G8 CHECK FOR CORRECT TBC MODULE OPERATION
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Disconnect the TBC module connector.
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Check the 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. TEST the system for normal operation.
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. TEST the system for normal
operation.
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