Oh gosh, there's so many diagrams that would need to be copied. Your best bet is to go on Ebay and buy a factory service manual. You can find them relatively cheap and it has all the diagrams you need.
Engine runs fine, wipers and squirters work, its just the lighting circuits I need really. They have to be modified for use in the UK, but they don't appear to have been, but struggling with wire colour codes and headlight relays etc. Also number 1 fuse( top left in fuse box) keeps blowing.
If you are friendly with your local Dodge dealer service dept like I am , they would be glad to help you with some advise or print you out a good schematic and they would know which one you need. I am always careful to always buy Mopar parts at my dealer on a regular basis. that makes them happy to help you at no charge. I have done it for so long I get all parts on the wholesale price list, even for my ram pickups. which I always think dealer parts are better than Auto Zone parts any day. But prices are about the same just a little more and sometimes less. They love it when I drive the Phoenix down to get parts, there are still people there that remember the van when I bought it new back in '86. They all say it looks a lot different now ...
Ask and ye shall receive. From my 84 factory service manual:
These are the basic wiring diagrams for an 8 cylinder engine with the standard electronic ignition. You also could have a van equipped with a engine control computer with or without an O2 sensor. There are also various sub-diagrams such as heater rear window, premium sound system, power windows, etc... I can get you those too, but I will have to dig out my manual and scan them.