6.0 No crank, No Injector Buzz, No OBD

[pwygocki]

Yesterday I replaced the number 2 injector on My truck (bad O ring) put the truck back together and now nothing. I turn the key forward and no injector buzz (rattle), starter does not attempt to crank and my scan gauge can no longer read from the OBDII port. I have checked all fuses, relays wires etc that I can think of. FICM gets Logic power, main PWR, MPR, and ground but does not run the injector test. The relays for the FICM all work and click. The starter relay clicks but will not turn starter. I can manually jump the starter and it cranks. The OBDII port has power as the scan gauge comes on but can not communicate. I have unplugged and plugged back in the PCM as well as the ficm and have looked at the wires for hours to find no loose ones or frayed ones. Seems odd that everything would go at once and I am sure it is something simpel But I cna not seem to find anything that points me to a common problem.
HELP Please!!! I am missing work as a result and low on beer with no way to get to the store

[dannyboy950]

There is a starter relay and fuse in the underdash fuse box. Did you get all the wires hooked back up to passenger battery. Did you remove any wires fom the fender mount solenoid passenger side. All grounds hooked back up?

Just reread post if you can jump the starter and works all wireing is good except the circuit from the key switch/ignition module check there.

[pwygocki]

Thank you for the reply Danny. Whaere is the circuit from the key switch/ignition module? All batteries wires etc that I can find are all good.

[dannyboy950]

Simplest test is check the small wire on the starter solenoid while a helper turns the key, you should get 12v if you do the circuit/fuse/relays from switch are good. If not it is a witch hunt requireing a good schematic and a tone generator is really usefull at this point. That is a long circuit goes thru several plug-ins and if I remember right changes color code twice inside the harness.

Good luck its a bugger to trace out.

[pwygocki]

Would that stop the OBDII port from communicating and the FICM not to do the injector buss test when the key is turned on?

[pwygocki]

So Turns out it was the PCM. Found a guy on Craigslist of all places that let me swap PCMs to see. Plugged mine in his truck and nothing just like mine. 140 miles later got a used PCM. Put it in and she is runnig like a champ. Based on readings codes etc before I am thinking the PCM has been having issues for awhile. Now I know



No Injector Buzz, No ODBII readings, No Crank and no Fuel pump= PCM

[dannyboy950]

Glad you got it sorted out. That would also explain the no obdII and inability to run buzz test. PCM failing to communicate. PCM runs the buzz test as well.

[Deer Creek]

Glad to hear you got it fixed! Great info.