Alternator has been replaced already, battery is only a year old. I know with the older Chrysler’s, the dashes were notorious for going out, but this seems to be a deeper issue than a dash cluster.

 

Wonder if there are any codes latched up in the various computers..

 

no codes from my handheld scanner.

 

Sure, it could be a short, or a corroded contact in a harness connector somewhere. And given the number of systems effected, it's likely a large one. Like one of the mains coming from the fuse block, the ECM harness plug, or a chafed spot in a harness. The corrosion issue in the ECM socket is a common issue on many cars with a firewall-mounted ECM, like the Durango. A known potential 'chafed spot' in your Durango, is courtesy of the A-frame near the steering knuckle.
I hate that type of intermittent 'gremlin'. They can drive a man to Crown Royal --- What can I say? I'm 'particular'.
Speaking of steering knuckles; Try steering back and forth to see if that narrows it down some. It could even be in the steering column harness itself.

ALSO: Check for any recalls still open on your serial number on the FCA site. There was one on "2011~2014 FCA's equipped with electro-hydraulic power steering systems, 5.7L or 3.6L engines, and 160, 180, or 220 amp alternators. In those vehicles, NHTSA says that the alternator may fail without warning". (which could also put a name to your particular gremlin).

 

Cleaned up every ground I could find, unplugged and checked every connector I could get to, will keep fingers crossed. Such an intermittent issue.....

 

Just an update, took the truck to the dodge dealer that did the original ecm replacement after the first alternator failed. Since the alternator went before the recall was issued and I was not reimbursed for it, they put a new alternator in. (Replacement oem alternator was just done 2 years ago, and about 30k miles) they also replaced the brake booster under recall. So far so good. Service said there were over 100 fault codes, all electrical issues. ( voltage to low from one thing, voltage to high at another, all over the place) I told them to drive it around for a day or 2, I was pretty sure the ecm was bad again. Over 300 miles on it, and no issues! I spoke to the service manager today and he said, they don’t really know what is going on with these trucks, but they eat alternators, and the electronics are so sensitive any fluctuations in voltage, they go haywire. He told me I would probably be back in 2 years for another alternator.....