Voltage problem

The first thing you need is a VOLTMETER and some other electrical tools, such as a 12V test lamp and a few alligator clip jumper leads

Then you need a factory service manual........which you can download.......for free.......from MyMopar Some of the manuals over there came from the guys right here. Also while you are there, wander around that page a bit, download the aftermarket wiring diagram (2 pages) which are often not complete but somewhat easier to follow at times.

Also wander around over there and you might save the "basic" wiring diagram posted for the alternator / igntion.

Now, with the car running on fast idle to simulate low/ medium cruise RPM, measure charging voltage, and again with headlights and heater powered on, and then once again with RPM higher, to simulate highway high speed cruise.

If voltage is much above 14.5 you have a problem

THE NUMBER ONE cause of over-voltage problems in these old girls is a poor ground between VR and the battery, and voltage drop in the harness. That is, the VR does not see battery voltage, but rather something lower, and compensates by ramping up charge voltage

WHEN YOU GET a voltmeter post back and we'll step you through this

Also please attempt to use proper punctuation and sentences so we can actually read what you are typing