Horten here is the ECM Performance wiring diagrams for your van:

 

You guys are the best! I have the diagram and print it out. We've decided to sell Horton, the 1990 van. Hopefully we can find a buyer who understands wiring or is willing to have the tranny shop fix it. I can't afford to do any more and will end up taking a loss. That's the brakes. We have acquired a 2002 1500 Regency Ram Van. Very happy with it.

 

Hope your new van serves you well. Check ebay for the owners manual and the Factory Service Manual. I bought both for my van from there.