Thanks for the the pix....it helps with explanation. The 3rd pix shows a mechanical (or up dated electronic voltage regulator) and subsequently a SQUARE BACK ALTERNATOR. These rebuilt aftermarket units can be adapted for use with your style voltage regulator, by GROUNDING one of the two FIELD CONNECTIONS on the alternator (it does not matter which field connection) which connects to the GREEN wire from the voltage regulator. The 4th pix shows, what appears to be, an unconnected field terminal on the alternator. This connection MAY BE GROUNDED thru the brush holder mounting screw.....which is acceptable....but confusing as it appears to be unconnected..... square back alternators have been prone to positive diode failures, due to inadequate cooling. A diode failure (open) reduces the alternator AMP capacity by a factor of two...or half the output yet the alternator will try and produce the 14.5 volt output voltage. IMO.....what you show appears to be correct. You could substitute alternator to see if your charging issue improves......Thank you for your help. Yes I do have a copy of the shop manual. I was able to find online.
Here are a few pictures of the wiring. The current alternator looks to be a SQUARE BACK. The car came with a spare as well. Both pictured.
Please let me know what else is needed for pictures to be helpful.
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ABSOLUTELY NOT......DO NOT ADD ADDITIONAL WIRE AS YOU NOTE. IF THE UNUSED ALTERNATOR connection is routed to the voltage regulator's green wire, it will SHORT OUT THE FIELD CONNECTION AND LIKELY DAMAGE THE VOLTAGE REGULATOR AND POSSIBLY THE FUSABLE LINK. Perhaps source a correctly rebuilt round back alternator.THANKS!!
So I am going to try a wire from empty field tab to the green side in the voltage regulator. This is correct?
Second option would be to see about getting a round back single field alternator and substitute it.
Let me know if I am understanding correctly.
haha - ok.Not sure what you mean....."So what is the way that I can use the current alternator?" .....post a for sale ad on the site?
When my alternators need work, i repair them my self. The AC Delco unit you show has a good reputation...perhaps you should also consider replacing the voltage REGULATOR...NAPA or Standard Motor Products markets one....~ $20.00....its the electronic replacement for the original mechanical voltage regulator....haha - ok.
I just meant can it be made to work. It sounds like no!
I am finding a single tab now. Nothing locally for me so I have ordered a single tab unit.
Remanufactured Alternator by ACDELCO - 334-2086Remanufactured Alternator - 334-2086 by ACDELCO on PartsAvatar.ca
I really appreciate the help. I will post update when I have it installed.
For whatever reason it all works now. I did nothing. Staying on the C side of the equation all the time.On a properly operating system, the Ammeter should consistently stay in the center and not read Charge or Discharge. During starting needle will likely be on D side, and after starting briefly be on C side of center, but should settle in the center.
Excellent results.....just a slight charge showing.....normal operation......