F 150 4WD V8-4.6L VIN 8 (2010)
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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Set a gain setting of 10 in 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 voltage between 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 system is operating correctly at this time. INSPECT the 7-pin trailer tow connector for evidence of water intrusion or corrosion. INSPECT the trailer
tow harness for evidence of chaffed wiring or improper wire repair. REPAIR wiring as necessary. CLEAR the DTCs. REPEAT the self-test.
No
GO to C8.
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C8 CHECK THE TBC MODULE PWM OUTPUT CIRCUIT FOR AN OPEN
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Ignition OFF.
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Disconnect: TBC Module C2142.
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Measure resistance between 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 C9.
No
REPAIR circuit CAT19 (BU). CLEAR the DTCs. REPEAT the self-test.
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C9 CHECK FOR CORRECT TBC MODULE OPERATION