You can get any wiring diagram? How about the starter circuit for 06ram quad cab? 4.7 loaded up.

 

Have a look here. Yes, it's a Russian site, but, I have been using it for a couple years with zero issues.

 

I wonder, do you have a security key?
I think they will crank no start and eventually stop cranking too...

Try a different key?

Please return and let us know what you find and how you fix it please.... we all want to know.
Cheers