2006 Dodge Caravan Rear Wiper

I was looking at one like yours. There is an accessories relay you should be able to remove to turn the power off to the rear wiper, see if it's a stuck relay by swapping it with another. It's in the power center in the engine compartment. It is controlled by the front module which gets a signal from the body computer. The BCM gets it's signal from the rear switch module. And the most likely problem is the rear wiper module, it contains the wiper park switch internally so the rear wiper doesn't stop in the middle of it's swing. Ok? All modules, but maybe that relay or switch could be bad. The dealer has the DRBIII which makes checking it fairly easy. Fairly. Not real easy.