Some Clarity on TBC Fault - Ford Powerstroke Diesel Forum

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post #1 of 5 Old 05-14-2013, 05:12 AM Thread Starter
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Some Clarity on TBC Fault

Ok, I've read a hundred threads on TBC fault with little consistency or solution. It seems like most of those threads die before the solution is shared. I've seen everything from a TBC light leading to a no crank, no start, to simply using brake cleaner to blast the connector.

Well, it happened to me this morning (Not towing). I had a slightly longer crank to get it started this morning. I shut it down in the drivethru to order and when I turned the key to start it up again I got the TBC fault light. She started up and drove just fine. I'd like to nip this in the bud before something big happens.

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post #2 of 5 Old 05-14-2013, 05:20 AM
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I would try the simple stuff like inspect the plug at the rear and wires behind the plug

and then I would also unplug the module and replug it

I agree to the dead ended post although I haven't had the issues I had followed plenty of threads
they either fixed a wire issue /the TBC fixed itself/it was replaced / or the thread was never updated

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post #3 of 5 Old 05-14-2013, 05:38 AM Thread Starter
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Thanks. I'll start there tonight. It's kind of wild to see all of the many, many symtoms that can trigger the TBC fault.
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post #4 of 5 Old 05-14-2013, 05:45 AM
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it's also interesting to see how much more integrated into the truck it is than a aftermarket controller

I do remember the pre 05 ish units had more issues but that was usually with a trailer due to the output voltage

I have never used mine LOL all th trailers either have no brakes / the one dump trailer must not be wired properly ? and my boat is hydraulic surge braked LOL

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post #5 of 5 Old 05-14-2013, 06:51 AM
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FWIW, when I changed out my injectors and was priming the oil rails (cranking) with the FICM relay/fuse and GPCM fuse pulled, the TBC fault showed up after about 20 seconds (?) of cranking. For the next 2 cranks it remained. When I reinstalled the fuses, The truck fired right up without the message. I didn't bother trying to trace why the TBC message came up in this instance.

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