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2010 Expedition Intermittent No Start/No Crank
Fixed it! And it was a very very dumb fix. Unplugged all my PCM connectors and cleaned everything with electronics cleaner and the truck started right up. I'm gonna guess a bad connection was preventing that ground from occurring. So simple, yet so frustrating!- touchdowntexas
- Post #14
- Forum: 3rd Gen Ford Expedition Electrical
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2010 Expedition Intermittent No Start/No Crank
Well...the freshly charged battery did nothing, which I'm not surprised about. I did bench test the relay and it clicks so seems to be functioning properly. I'm thinking whatever I'm seeing on Pin 2 is likely not a good enough ground, and grounding it separate of the PCM would likely fix my...- touchdowntexas
- Post #13
- Forum: 3rd Gen Ford Expedition Electrical
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2010 Expedition Intermittent No Start/No Crank
Thanks again, and Happy Thanksgiving! I did a little bit more diagnostic work with the multimeter and I feel like my truck should be starting. I'm in the process of charging the battery as that was reading low and maybe that will miraculously fix it. But here's what I found. I also attached my...- touchdowntexas
- Post #11
- Forum: 3rd Gen Ford Expedition Electrical
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2010 Expedition Intermittent No Start/No Crank
Thanks! This is my first time doing any real electrical diagnostic work, so apologies if my lingo isn't 100%. So the PCM sends a signal to send 12V to pin 1 AND closes some other internal relay to ground pin 2? That seems unnecessary and redundant. So you just connected to yellow wire to a...- touchdowntexas
- Post #9
- Forum: 3rd Gen Ford Expedition Electrical
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2010 Expedition Intermittent No Start/No Crank
Did you ever get this figured out? I've got a 2012 F150 showing the same behavior. Intermittent start issues, but the truck always starts if I jump the starter relay pins. Forscan seems to show all of the relevant BCM PID's as ready to start. On the PCM side I get the same SMC_MON "OFF" when...- touchdowntexas
- Post #7
- Forum: 3rd Gen Ford Expedition Electrical
