Re: {Chrysler 300} 66 300

Robert, the later square back alternator has two field lugs. The earlier round back has one field lug. A square back can be used with a mechanical regulator provided either field lug is grounded, doesn't matter which.

You full field (test) either type by disconnecting the field wire from the alternator and applying battery voltage to the field lug. That will drive a functional alternator to 15-18 volts depending upon RPM.

The alternator is internally grounded to the case and hence the car. Ground wires are used but probably not required.

The aforementioned is subject to correction by John Grady or others far smarter than I.

Danny Plotkin

Sent from my Verizon, Samsung Galaxy smartphone

-------- Original message --------

From: ROBERT HAAG <scooter465@xxxxxxx>

Date: 10/22/24 8:58 PM (GMT-05:00)

To: Drew W Carl <drew@xxxxxxxxxxxx>

Cc: "Chrysler list server (chrysler-300-club-international@xxxxxxxxxxxxxxxx)" <chrysler-300-club-international@xxxxxxxxxxxxxxxx>

Subject: Re: {Chrysler 300} 66 300

All the same till 1970

When they went to electronic voltage regulator 1 field plug and

Battery lug.

1961-69 has two field

Plugs and battery lug.

Bob Haag

On Oct 22, 2024, at 7:59 PM, Drew W Carl <drew@xxxxxxxxxxxx> wrote:

Can anyone verify for a 1966 300 with a 440, should the alternator have a ground wire attached to it like my 62? My 65 imperial also has this same wire but the 66 I am working on does not. I am wondering if some one cut if off in the harness. When testing this alternator, and voltage regulator is grounding the single feed wire what would cause the alternator to put out voltage? I am trying to test it in the car, the manual on the website is quite thorough but for the person I am working for they would like to replace the unit. I just need to determine if I need an alternator, voltage regulator, or both. The car seems to have had some hacking done to the electrical. I have to hook the body ground back to the battery, its gone. No idea where it went originally. I can see some wire ends have been replaced and probably the voltage regulator at one point. Just makes me wonder wire I only have the field wire and the heavy output wire and no ground. Thanks for all the help. I am starting to feel like I am sending too many messages about this car.

--

Drew Carl
Owner, eScore

Phone: 724-288-6636

Email: Drew@xxxxxxxxxxxx

Website: www.escoremx.com

Address: 523 Westland Rd. Hickory PA 15340

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