Ground Near TCM

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brfails

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I have a 2018 Raptor and I’ve been having some issues with multiple warnings on the dash associated with a no crank situation. I have installed a new battery, and had to replace the mega fuse near the fuse block. This was replaced after I installed a new battery, started the truck, let it run for a while, and then it shut off leaving a zero power situation (only power was from the battery to the fuse block connection, but it ended there). After replacing the battery and mega fuse my truck functioned normally for about a week and a half. It then stalled, the dash warnings reappeared and after turning off the engine, the no crank condition returned. The only times I have been able to remedy the situation and have the truck start is by disconnecting and then reconnecting the electrical connection at the TCM. Today while working on the truck, I noticed a ground wire that terminated near the TCM, but the other end of the wire is not connected to anything, I am just wondering where that ground wire should be going if anyone knows, and if that could be a possible cause of the problem. Thanks in advance.
 
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brfails

brfails

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IMG_4741.jpegIMG_4744.jpeg
From what I have read it is ground G306. Not sure what wiring harness/bundle it connects to, if any.
 
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mprice1234

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First read and I thought it wasn't connected to a ground point, but picture show it is and looks like the other end has been ripped off or chewed. Amazing how much help a picture can be. Hopeful @FordTechOne can give you some direction to go.
 

FordTechOne

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From what I have read it is ground G306. Not sure what wiring harness/bundle it connects to, if any.
Yes; that is G306. What led you to unplugging the TCM?

You’ll really need to duplicate the concern and have ForScan available to troubleshoot.
 
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brfails

brfails

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I read in a different thread that it was a possible solution due to a bad connection or pin. I have been attempting to replicate the issue over the past couple of days to establish patterns to narrow down causes. I am driving around holding my breath just waiting for it to happen again, because when it does it means I am stranded wherever I can coast to. When it reappears I will gather codes/communication data using ForScan and update the thread.
 
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