Get a code reader and see what's shorting... possibly something has corroded and the moisture is enough to cause a short. Could be a tps sensor... could be something critical.
It's been doing this for years. The nearest Dodge dealership can't find anything wrong with it.
Electrical diagnosis is an entirely different beast. Your local dealership probably doesn't have someone capable as technicians these days are part swappers. Better luck at a reputable shop with an older tech.
What's codes came up?
I have no idea what codes come up. I am not a mechanic and don't have the equipment to check.
Basic code readers aren't that expensive, or difficult to use. But value wise it's probs better to pay a modest fee to a shop to get them to pull the codes. That takes like 5 minutes and they probably have the expensive readers that can print the results.
Here is the Community to post all things to keep your older running like a dream.
Tip 1: Buy from reputable car brands such as Honda/Toyota.
Tip 2: Wait a year before buying a car model to have all the problems out in the open.