Wiper fluid reversal

I see no one has replied yet so I'm going to tell you more than I know. Caravans used to have a washer fluid bucket and pump in the rear. We used to joke that we were filling up the blinker fluid. Now there is no reference to a pump in the rear for your model. It appears everything is done with just one pump, and from what I can tell, they run it one way for the front, and reverse the polarity to run it the other way for the rear. The pump motor is run by the "Totally Integrated Power Module", (TIPM), which is a rather complicated computer within the under-hood fuse box. It interprets the digital signals it gets from the washer switches, then decides how to run that pump motor. I find it hard to believe something could be wrong that it runs the pump the wrong way, but it still runs. Most circuit failures result in it not running at all.

The problem with this is when I researched the replacement pump assembly, it has just one hose port like all normal pumps have. I can't find an explanation of how fluid flow determines which way to go. One possibility is my resource is showing a generic replacement pump that is not correct for your van.

There's two things you can look at. First, find the pump at the bottom of the washer reservoir. Often you need to remove part of the plastic inner fender splash shield, then it's right there in the open. You might also see the pump when laying on the ground under it and looking up. If you see two small black hoses attached to it, switch them; problem solved.

If there's just one hose, feel the motor to tell if it's running when a helper presses the front washer switch. Feel if it runs again when pressing the rear switch. If it runs both times, you'll need to switch the positions of the two wires in the connector plug. I can describe how to do that if necessary. The only logical way those could have been switched is if the vehicle was crashed or if some other damage occurred to the plug, and someone spliced in a new one and got the wires wrong.

It is also possible there is a second pump motor for the rear that I couldn't find on the wiring diagram. If you see that, someone may have inadvertently switched the hoses or the connectors. Chrysler is pretty good about making the plugs just different enough so they can't be mixed up, but that never stops some people from pounding them in.

Please let me know what you find.

Wonderful. As I said, the photo I found for the replacement pump only showed one port, but that might have just been a representative photo they use for all kinds of similar products. Happy to hear you solved it.