I'm using a wiring harness from a 90 Dakota in my hot rod.
After 178,000 miles, the charging system quit working. I replaced the alternator, still not charging. The old alternator field tested good, but it had a lot of bearing noise, so I went ahead and replaced it anyway.

We determined the computer that controls the charging system wasn't doing the job. I remembered back in the day we could wire in a Mopar electronic regulator and solve the problem, so that is what I did. I chased down the blue wire (Ign power) and green wire (field lead off the alternator) that both connected between the computer and the alternator. I spliced the blue wire to the correct terminal on the new regulator and to the alternator. Then I cut the green wire from the alternator and connected it to the correct terminal on the new regulator. I taped off the end of the green wire that originally went back to the computer.

The charging system works great now.

By cutting the green wire to the computer, I am now getting a check engine light, and a code for an incomplete alternator circuit. The question is, can I connect the blue wire to the green wire going to the computer and turn off the code and the light? Originally, the blue wire came out of the computer with battery voltage then connected to the alternator field wire (two field wires), which went through the brushes and came out to the green field wire and went to the computer, as I understand it. Gene