E 450 V8-5.4L (2009)
D6 CHECK THE TBC MODULE PWM OUTPUT CIRCUIT FOR AN OPEN
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Measure the resistance between trailer tow 7-pin trailer tow connector pin-3, circuit CAT19 (BU), harness side and TBC module C2142-14, circuit
CAT19 (BU), harness side.
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Is the resistance less than 5 ohms?
Yes
GO to D7.
No
REPAIR circuit CAT19 (BU). CLEAR the DTCs. REPEAT the self-test.
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D7 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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Input a gain setting of 10 into the TBC module.
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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 7-pin trailer tow connector pin-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 D8.
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D8 CHECK FOR CORRECT TBC MODULE OPERATION
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Disconnect: TBC Module C2142.
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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: TBC Module C2142.
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Make sure the connector is seated correctly, then operate the system and verify the concern is still present.
