my 2003 6.0 just died driving down the road. coasted into parking lot tried to restart nothing no crank or clicking at all. all the dash lights came on glow plug light etc but no crank. I have replaced the hpop icp, ipr. truck ran fine after that but then this issue started. also tried to pull codes with my sct tuner and my scan gauge 2 both power up when plugged into obd2 port but just say connecting and never connect. I pulled both the ficim and the pcm and they were put into another 2003 and the truck ran fine...... checked for chaffed wires till the cows come home and cant find anything. batteries are both good. any help would be greatly appreciated! thanks Mike

 

Are wires getting warm at the starter?

Try pulling the serpentine belt and see if it cranks.

 

Try unplugging the clutch fan and see if it will crank.

 

Unplugged still no crank jumped starter with yellow wire on passenger side got it cranked

 

But still no crank from ignition also replaced ignition switch......checked the pins to the obd2 have battery voltage there but both my SCT tuner and my scan gauge 2 can't connect.

 

Also wires are fine at starter no heat there. Also checked all the areas in previous threads for chaffing. Didn't find any???

 

Have you tried starting it in neutral. Have you checked all of the fuses including the ones in the engine compartment on the drivers side?

 

From m-chan68 in a post on a similar problem:

The PCM is not supplying ground to the ground side of the starter relay for whatever reason. Start unplugging three-wire sensors under the hood, one at a time, until communication is restored to the PCM for the engine to resume cranking over again. I would start with the fan clutch wiring connector.
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Sound to me like he's saying possible vRef short. Also check fuse 22 he mentions.

https://www.ford-trucks.com/forums/1...-no-crank.html

 

Checked all three wire connectors I could find still no go

 

Also no start in neutral

 

you need a DVM to check the PCM Plud and the OBDII Port

 

Checked power to obd2 it has battery voltage at required pins. Also the PCM and ficim work fine I another 03 6.0 but when back in my truck worked great for a few minutes then no crank also truck says 4 low and it's electronic and I can't shift it out of 4 low either

 

https://www.ford-trucks.com/forums/a...7&d=1340424187
Here's the pin-out for the PCM. Check power to it.

 

 

Hey rusty if I am standing on drivers side looking towards passenger side from front bumper which plug is which on the PCM