Blowing voltage regulators

I would be with 1969383S and suspect wiring and/or a grounding issue.

I would buy a new VR Plug, as it may have bad connections INSIDE it where you can not see.....I have had this issue with a VR Plug before....looks good and may test good, but once you are driving the bad connections inside it jiggle from good to bad.

vrplug.jpg