4 years? I don't think the JL has been out that long??Dielectric grease for sure - I have lots of that for my boat the X-Treme Tape looks like it may work, but it may be hard to apply.
Mine took 4 years to start. I got a random blinking sway bar light. Now, the entire thing is trashed. Definitely not under warranty.
Pull off the connector and take a look. Let us know what you see.
I don't know yet, do you have yours? Mine is scheduled for delivery soon in the next 1-2 weeks hopefully. Based on this (https://www.thedrive.com/news/33208...rams-can-disconnect-at-highway-speeds-lawsuit) it is affected until 2020 but this article was posted in April 2020.
I can say it's safe to assume, no, they didn't come up with a better solution.