Total loss of ignition at speeds 60 -80 MPH on cruise control once I pull over to the side of the road it will restart. But it just goes flat nothing is electrically on

Total loss of ignition at speeds 60 -80 MPH on cruise control motor completely shuts down once I pull over to the side of the road it will restart. it just goes flat? nothing electrically is on. My check engine light has never flashed or on and the scan tool shows no faults I have no idea what the this could be. One thing I might add is I change the knock sensors under the intake manifold and changed out 2 coilovers not overheating getting better MPG than I did before.

 

That sounds likely to be an issue with the ignition switch or related circuit. What model year is your Durango and what is the trim level and engine?

-Rod