Pcm ground location?

[Bgraham]

I have power to the ecm/pcm/eps fuse 78 and fuse 22 ecm. But still have a no communication. I can scan all modules but the engine. The truck was running fine at lunch then when I got off work I had a no crank no start issue. I have checked all connections and load tested the battery, and all seems good. Also has a push clutch to start on the gauges but it's a auto. It's a 2015 Laramie tuned/deleted. I hooked up my sft tuner and it came to life long enough to load the original tune, then back to no comm. I have another pcm on the way, but thought I would post here incase some has had similar issues. THX

 

[TC Diesel]

Did you check Big connection under Dash

 

[Bgraham]

Yes.

 

[TC Diesel]

Is the Battery fully charged... I have to ask...

 

[Bgraham]

Yes that was the first thought I had. Charged and load tested.

 

[Bgraham]

I also have another push button ignition switch and pcm in the way.

 

[TC Diesel]

I'm not too familiar with the electronics of the VM 3.0 and Ram 1500, Do you have ALFA? How Many FOBs Do You have.

 

[Bgraham]

I recently got alphaobd and have 2 fobs. I have not tried the other 1, but will today.

 

[Bgraham]

So I just tested the pcm fuse f72 with a test light and it has ground going to it.

 

[Bgraham]

Anyone have the pcm pinout and star connector pinout? THX