04 dodge , cummins no crank

Went down to the hardware store, came back out , turned the key, nothing. got dash gauges,dings when the key is on , lights. Turning the key to start nothing changes, no dimming, no clicks. Got it towed home. Figured it was the ignition switch , changed out the electrical unit. Nothing changed. Good batteries , clean and tight cables, could the starter just stop working????? but there is no draw on the system when the key is turned to start. Where to look next?

Auto or stick? Does it have anti theft?

It's a auto trans. anti theft ? right now I wish someone would. If your talking about the key thing , no. Same key since new.

checked all the fuses in the fuse relay box under the hood, starter wire tight, ?????? Need to check connections under the fuse / relay box

I had the same issue with my 07 6-speed. "No bus", the connection between the cab and the engine compartment gave up the ghost. Took a long time to find, had to replace wiring and the main connectors. My 04 automatic truck was a Laramie and had a bus issue also. I would get a message on the dash that said "no bus", but it would always come out of it after a while. May have something to do with the junk TIPM too.

Starter relay under the hood. Try swapping them around with the horn or trailer relay.

Well I have some good news and some bad news. The good news is I got it started and running, the bad news is I don't know what I did to make it start. I swapped around a lot for fuses, relays everything that had anything to do with the start and run sequence. I opened and closed a bunch of plugins, looked at a lot of wires, didn't find any corrosion anywhere. I even pulled the starter and had it checked , still nothing. Then after some more probing it started and runs. This makes me a little leery as if it happens again i'll be out in the middle of nowhere with no idea of what to look for again. Thanks for everyone for your input

My 05 started doing this and it was the contacts inside the starter worn out fyi.......cheap easy fix