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denso alt
https://slantsix.org/forum/viewtopic.php?t=52264		 Page 1 of 1
Author:  terrylittlejohn [ Tue Jun 04, 2013 6:56 am ]
Post subject:  denso alt
trying to run an Chrysler denso 3 wire alternator on my test stand , the stock alternator packed it in, can anyone explain if it`s possible to wire this to charge on it own? I have tried the light bulb in one wire and 12v to both and nothing seems to work. is there a way to bench test these alt to see if their good. thanks terry
Author:  Sprag [ Tue Jun 04, 2013 2:19 pm ]
Post subject: 
It should work fine with the standard 2 field wire setup as per the following from Ebooger's info on Allpar (scroll down):

http://www.allpar.com/history/mopar/electrical.html

I'm doing this on my build now, only using the more unusual late Chrysler 120a alt mentioned in that same article.

EDIT MORE INFO: Neither the late Chrysler or the NipDenso will "charge on it's own", they are both regulated by the engine bozoputer so you must use a separate regulator to run them (per above images). +12v from switched ignition to one field, the other pins to the regulator output. It makes no matter whatsoever which field connection on the alt gets which wire. In my own layman's terms; You see in the image on the right that the oem blue wire gets 'spliced' so it becomes two feeds, one "turns on" the regulator, the other "turns on" the alternator, then the regulator output wire tells the alt when it needs to run it's mo-jo. This would be a "charge on it's own" or 'one wire' arrangement if you could figure out how to stuff the regulator inside the alt case.
Author:  terrylittlejohn [ Tue Jun 04, 2013 4:12 pm ]
Post subject: 
I can`t open the picture so I can`t see what regulator you are talking about, so can I use the old style regulator with this newer alternator? or is the some other I have to get?
Author:  Charrlie_S [ Tue Jun 04, 2013 4:28 pm ]
Post subject: 
You can use the "Normal" electronic regulator, but not the old style mechanical, or the electronic version of the mechanical. In other words, use the regulator that has the triangular plug.
Author:  terrylittlejohn [ Tue Jun 04, 2013 4:34 pm ]
Post subject: 
ok thanks , I wasn`t sure if it already had an built in regulator. is there any way of testing these alt to see if the alt itself is ok?
Author:  Sprag [ Tue Jun 04, 2013 5:25 pm ]
Post subject: 
Sorry, I forgot that Allpar breaks image links somehow, but that image is there with the info in the link posted above. Here's the same image with the important wires highlighted.

Image

I think if you already have the ND alternator and no other options, it's easier to just mount it up and test it yourself rather than taking it somewhere for testing. It should only require one wire patched in if you were using a regular Chrysler set up before (with electronic regulator). If your test stand still uses the old mechanical regulator set up, now is a great time to ditch that for good.
Author:  terrylittlejohn [ Fri Jun 14, 2013 7:00 pm ]
Post subject: 
seems I had a lot of good alt and two bad regulators, got them working
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