No start!

[huntinguy]

Ok guys the truck(04) has been sitting for a few months with a bad tranny. So yesterday we went to get it running so we could move it up into the shop to put the new tranny in. I turned the key on and everything came on but the injectors don't buzz. It cranks but it won't start.

Thinking it was the FICM we took it out and rebuilt it. That didn't do it.
I have 48v on one stud, 12v on another and 0 on the other two.

If I hold the FICM power relay closed the injectors will buzz and the truck will start and run. But if you let go of the relay it dies. There's only 9v to the relay.

anybody know what it is. I am pretty sure it's a bad FICM but everything looked good inside the FICM. Could it be bad battories?

Thanks! Tranny is coming tomorrow so I need to get this going.
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[Goose]

How many pins does your FICM have? Was that 48v with KOEO or cranking? My FICM will show 48v all day long at KOEO, but will drop dramatically while cranking and running.

If you have a 7 pin FICM, test the pin on the upper left pin. If it is a 4 pin FICM test the pin on the far right(drivers side)

and yes, bad batteries will cause a no start. If the PCM doesn't see 11v it wont fire. Bad batteries will also kill a FICM.

 

[huntinguy]

I got it fixed. It was a bad wire from the fuse box to the FICM relay. Thanks.