Charging System

[6camaro9]

I have a question about the charging system on a 66 Mustang and I am hoping someone here can help. The system will not charge the battery when everything is plugged up like it should be. If you unplug the external regulator and jumper out the 1st and 3rd pin then the alternator will charge up the 17.5V since there is nothing to regulate it. Changed the regulator and it does the same thing as before. I can read less than 1 Ohm across the regulator so it should be good. I am at a loss here and pulling my hair out. If anybody can tell me something I might be missing I would really appreciate it. The car also has a new wiring harness under the hood and in the dash. Thanks for any help.

[Novacaine]

Is the alternator new or used? What style is it original? Just for loss of extra hair sake you may want to check out the alternator. I had that problem last week on a friends car. Brand NEW alternator and it was bad. Good Luck.

[6camaro9]

Thanks for the suggestions, the alternator is new and this the third one. It is a Ford 1G I believe with the external regulater. My dad recently put an aftermarket wiring harness in it and I believe it has something to do with the way the factory style harness is wired. I have decided to go with a one wire alternator and eliminate the external regulator and hopefully this will work. Appreciate the help. What part of Alabama are you from, I will actually be in Hover next week on business. Love the area, lovely state to travel through.

[Novacaine]

About 20 minutes west of Huntsville. If you come down I-65 watch your speeds cause the FUZZ has been on a roll getting people for speeding for about the last 6 months. They have plain colored Tahoe's sitting on the side of the interstate getting people. Just FYI... That one wire alt. should fix your problem when wired up. Good luck.