https://www.ebay.com/itm/1996-DODGE-RAM-VAN-WAGON-REAR-WHEEL-DRIVE-FACTORY-SERVICE-MANUAL/382258712670?hash=item590065105e:g:8EwAAOSwHLNZWvIs&vxp=mtr

Will pay for itself many times

Chrysler also sells a thinner supplement book on
Diagnosing the Electronic Fuel Injection MPI system that has helpful fault guide tables and IF-Then troubleshooting flowcharts

This one is for the V10 pickup
but look for a similar book for the 1996 Ram Van

https://www.ebay.com/itm/1994-Chrysler-Dodge-Ram-Truck-8-0-L-Electronic-Fuel-Injection-MPI-Manual/292150250650?hash=item4405830c9a:g:0uQAAOSwAO9ZQOSr&vxp=mtr