no crank no start

weweld · Jun 20, 2014

Truck started fine yesterday then died , Turn on the key you get no fuel pump and no cranking. also the glow plug light stays on real long used to be on just about 10 seconds. If I unplug the engine harness at the pcm the fuel pump runs and the starter will crank. Checked all the fuses and relays replaced the pcm and ficm and no change. HELP please !!

Gene

weweld · Jun 21, 2014

put in a new pcm today and the fuel pump came on the starter engaged and the motor cranked over for about 5 seconds then everything stopped and I'm back to where I started :slap:

bigrpowr · Jun 21, 2014

mother bitch! sad part is , I would be calling you in a similar situation.

weweld · Jun 21, 2014

even has my local ford tec puzzled

weweld · Jun 21, 2014

Just found this at the Association of Diesel Specialist's...

This 2004 F-250 that had a issue. This was a 6.0L that would not crank, reflash or run self-tests or program the PCM either. I have learned that these two engines use three connectors wired to the PCM. There is an engine connector, body connector and one for the automatic transmission. The PCM will operate but not display any PIDS or scan data if you remove the engine connector on either model.

Upon disconnecting the engine connector, the PCM became responsive and would run the self-tests. The PCM also would allow program updates from the IDS scan tool. In other words, the PCM acted normal with the engine connector was disconnected. When you reconnect the PCM, cycle the key, the PCM would become unresponsive, display blank PCM message all over again.
The 2004 F-250 was repaired by replacing the crank sensor, the engine harness and the PCM. We concluded that there was a short in the harness that partially shut the PCM down. We had found the crank sensor was not responsive and the harness had a short. The PCM was damaged from the short.

Looks like a good place to start !!

Gary · Jun 22, 2014

Does it have communication with a scanner? If so what codes does it have?
Does the fuel pump have power going to it? What year is it?

weweld · Jun 22, 2014

no communication with a scanner. No fuel pump and no starter. 04 F250

Gary · Jun 23, 2014

I'd be looking at the fuse panel under the dash. The fuel pump relay is in there
and isn't serviceable, so if the relay fails the whole fuse box must be replaces. Your
two other problems could also be in the box.
Also check the ignition switch, with the key in the run position everything except the "crank" wire should be hot.