I don't doubt the alternator is fine. It's the wiring that gives more trouble. Here's two drawings of Engine Computer connectors. I can't find a '91 service manual. The closest I have is for a '93, and it shows the big 60-pin connector on the right. I tried to help someone else recently with a '91 Dakota but he said he had the three connectors like on the left drawing. That is for a '96 and '97 model.
I thought a '91 had the computer next to the battery behind the left head light and the big connector. If yours has that type, does it also have a separate 14-pin connector next to it?
If you have the three smaller connectors, the computer will be on the right inner fender halfway between the head light and firewall.
Images (click to enlarge)
Friday, March 23rd, 2012 AT 3:28 AM