05 no crank or anything

[RedneckJacob]

05 f250 6.0 that had a random shut off problem. sometimes 2-3 times a day sometimes not at all. it would fire right back off and run fine. now headed home thursday night from work it just shut off and never cranked or anything acted like the batteries were gone. dash lights and everything else work. On the dash it says check gauges has the squiggly for glow plugs and the little wrench thing showed up. checked all fuses all were good. thought the pcm was bad changed it and still the same problems. crossed the wire bythe pass battery and it cranks but dont start also the fuel pump doesnt cycle also no injector buzz or anything wtf is the problem?? this is my only truck and need it for work

[JER-1]

DON'T REALLEY KNOW BUT I'd research the FIMC See if that may relate to problem.
JER-1

[RedneckJacob]

Checked ficm has 47.8 v

[kaya@bernhausen]

check the codes. if unable to communicate with pcm it sounds like a pcm power or ground issue. on these, the starter signal also runs through the pcm, if i'm not mistaken. there should be a pcm relay and probably 2 fuses. i would look up the wiring diagram for the pcm power and ground paths and check for your 2 powers and probably 3 or so grounds at the pcm. if keyed power is missing, follow the path. check the relay and the 2 or so fuses and power source.
the problem may even be as simple as a bad connection at one of the pcm connectors. if no comm, check that first

[RedneckJacob]

No pcm communication and what are the 2,relays by the driver battery??

[kaya@bernhausen]

there should be a box on the dr. side with relays and a lid that will have the description of each. i believe. they change these from year to year so it's hard to remember.
check the pcm connectors first though. it sounds like you've got one of them with a bad connection. disconnect them and look at the pins. make sure there's no corrosion or water in there. sometimes just disconnecting and reconecting is enough to make a good enough connection to get it going again. if that checks out, try swapping the pcm relay with say the horn relay. if that doesn't work, and all your fuses are good (they likely will be since the problem was recurring), you'll need to start actually trying to find the problem. this is when a pinout of the pcm will be required. you'll need to check both powers to the pcm and your several grounds. if one is not present, you'll need the diagram for that circuit to pinpoint the problem

[RedneckJacob]

I swapped the relays around the other day and it didn't make a difference. Idk what else to do I didn't smell any wire smell or anything

[kaya@bernhausen]

just follow what i'd explained.
first, find a pinout for the pcm. then, highlight with a felt marker the powers with one color, and the grounds with the other. then, disconnect the appropriate connector at the pcm and check for power and ground at the specified pins. you can use a 2$ test light even.

[RedneckJacob]

Alright let you know how it goes never had to experiment with stuff like this. First 6.0 so its way different.

[RedneckJacob]

Fuse 22 engine control blown fired right up