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A Complicated F-150 No Crank No Start


We seem to be on a roll with relatively lengthy case studies these days. But, just like the last one, we think you’ll find this one worth the read. It comes to us from Billy in Florida and involves the usual situation of having made several unsuccessful pit stops before it got to him. And, judging by the comment on the case study, this a common enough issue on a very popular vehicle that it very well could be worth a bookmark to avoid major hassles down the road.

In this detailed study, Billy recounts the tale of a no crank, no start 2015 F-150 that was misdiagnosed by several earlier repair attempts as well as being used for target practice with the parts cannon. When it got to him, he started his diagnostic process based on knowing the prior repair attempts highlighted issues with the transmission range sensor position. Armed with service data and electrical schematics, Billy started by performing several voltage tests, which lead him down his methodical diagnostic path. 

As he states at the end of the case study, “It’s just a perfect example of why we have Alldata or similar services that are paid for, and why it’s so ungodly important to perform pinpoint tests to verify conditions. I hope this helps somebody. It only took about two hours to figure out what was wrong with it, [but] it’s a great example of what we see every day as diagnostic technicians.

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