Wipers/washers are different subject and should be posted in a different thread. A quick search will bring up results. Try "washer motor" and I think you'll find what you need. If not, please post your question in one of those threads and I'll be happy to answer questions or assist you there. Another thing worth mentioning is there's a free downloadable PDF of the 87 Factory Service Manual HERE:
https://drive.google.com/file/d/1q4u...7wOD7nKyF/view. If you go to PDF page #1015 you will find electrical schematics for the van start there. Wipers/Washers are covered on PDF page #1019. Have fun. Tim