Go Back   The Ford Barn > General Discussion > Model A (1928-31)

Sponsored Links (Register now to hide all advertisements)

Reply
 
Thread Tools Display Modes
Old 08-02-2020, 01:24 PM   #1
louieglen
Senior Member
 
Join Date: May 2010
Posts: 218
Default alternator

I bought a model A the fellow said he had just put a new 6V alternator on. I got it home noticed it wasn't charging Checking it has a 12V battery neg ground. How much trouble am I in? What alternator do I need to get that will fit the A? Thanks in advance.

Last edited by louieglen; 08-02-2020 at 01:36 PM.
louieglen is offline   Reply With Quote
Old 08-02-2020, 01:28 PM   #2
wmws
BANNED
 
Join Date: Feb 2013
Location: Coatesville, Pa
Posts: 719
Default Re: alternator

Have you had trouble with the battery discharging.
wmws is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 08-02-2020, 01:36 PM   #3
louieglen
Senior Member
 
Join Date: May 2010
Posts: 218
Default Re: alternator

Yes.
louieglen is offline   Reply With Quote
Old 08-02-2020, 01:44 PM   #4
wmws
BANNED
 
Join Date: Feb 2013
Location: Coatesville, Pa
Posts: 719
Default Re: alternator

Have you checked the output of the alternator with a multimeter. If so what did you get for output. If the output is good you may just have a bad battery not taking a charge. If your not getting any output then maybe you have a bad diode or some other trouble in the alternator. I will let others recommend and alternator as I don't use them.
wmws is offline   Reply With Quote
Old 08-02-2020, 02:07 PM   #5
wmws
BANNED
 
Join Date: Feb 2013
Location: Coatesville, Pa
Posts: 719
Default Re: alternator

I just noticed that you have a 6 volt alternator and a 12 volt battery. That won't work.
Go all 6 volt or 12 volt. I would check the output of the 6 volt alternator and if it is good just put in a 6 volt battery.
wmws is offline   Reply With Quote
Old 08-02-2020, 02:25 PM   #6
Charlie Stephens
Senior Member
 
Join Date: May 2010
Location: Southern California
Posts: 7,017
Default Re: alternator

Sponsored Links (Register now to hide all advertisements)
Quote:
Originally Posted by louieglen View Post
I bought a model A the fellow said he had just put a new 6V alternator on. I got it home noticed it wasn't charging Checking it has a 12V battery neg ground. How much trouble am I in? What alternator do I need to get that will fit the A? Thanks in advance.
What do you mean when you say "Checking it has a 12V battery neg ground". What is "it"? Is the vehicle 12 volts negative ground? Is the alternator 12 volts negative ground? If "it" is the alternator did you check it out or just read the tag? If you just read the tag may have been left over from before the alternator was modified the alternator to 6 volts.

Charlie Stephens
Charlie Stephens is offline   Reply With Quote
Old 08-02-2020, 02:45 PM   #7
louieglen
Senior Member
 
Join Date: May 2010
Posts: 218
Default Re: alternator

I don't understand your question. The car has a 6V alternator, and a 12V battery the neg. post is grounded to the car.
louieglen is offline   Reply With Quote
Old 08-02-2020, 02:51 PM   #8
louieglen
Senior Member
 
Join Date: May 2010
Posts: 218
Default Re: alternator

I don'T want to change the 12V battery with a 6V. if I did that I would have to redo the head light's they are sealed beam. I would rather change the alternators. I need to know what 12V alternator single wire neg ground to buy that will fit the car.
louieglen is offline   Reply With Quote
Old 08-02-2020, 05:31 PM   #9
Mulletwagon
Senior Member
 
Mulletwagon's Avatar
 
Join Date: Jan 2019
Location: Florida Panhandle
Posts: 585
Default Re: alternator

All Model A parts dealers offer 12v alternators that are bolt on. Just an example:

https://www.snydersantiqueauto.com/P...el-a/generator

IMHO, negative ground 12v is the way to go.
Mulletwagon is offline   Reply With Quote
Old 08-02-2020, 07:18 PM   #10
duke36
Senior Member
 
Join Date: Jun 2015
Posts: 1,414
Default Re: alternator

Wagner Products: reliable and good pricing, 6v and 12v.
duke36 is offline   Reply With Quote
Old 08-03-2020, 07:52 AM   #11
larrys40
Senior Member
 
Join Date: May 2010
Location: St Charles , Missouri
Posts: 1,994
Default Re: alternator

Quote:
Originally Posted by duke36 View Post
Wagner Products: reliable and good pricing, 6v and 12v.
Duke,
Yes tom Wagner has without question the best alternator and bracket out there.
Tom is part of our st Louis Model A club and is not only a great knowledgeable guy on auto electrics but has the best alternator. I use them in customers cars all the time.
The other brands don’t hold a candle.

Look up Wagner products on line or he advertises in the Model A News and Restorer .
Larry shepard

Last edited by larrys40; 08-03-2020 at 09:57 AM.
larrys40 is offline   Reply With Quote
Old 08-03-2020, 09:13 AM   #12
Badpuppy
Senior Member
 
Join Date: Dec 2017
Location: Guthrie, OK
Posts: 1,142
Default Re: alternator

The 6 volt pos or neg ground alternator is a conversion of the original Delco 10Si 12V negative ground, which are common as nails these days and can be had pretty cheap. Even the Asian knockoffs work well; the tech isn't rocket science any more. They were used on most Chevy models, many small Fords, AMC Jeeps, and others back in the day. You should be able to do a direct swap. You could then sell the 6V and make a few $$.
Badpuppy is offline   Reply With Quote
Old 08-03-2020, 09:23 AM   #13
katy
Senior Member
 
katy's Avatar
 
Join Date: Jun 2015
Location: Red Deer, Alberta
Posts: 5,011
Default Re: alternator

Quote:
I bought a model A the fellow said he had just put a new 6V alternator on.
Why not contact the PO and verify that it is a 6V alternator.
__________________
If you don't hear a rumor by 10 AM, start one!.
Got my education out behind the barn!
katy is offline   Reply With Quote
Old 08-03-2020, 04:53 PM   #14
Patrick L.
Senior Member
 
Patrick L.'s Avatar
 
Join Date: May 2010
Location: Largo Florida
Posts: 7,225
Default Re: alternator

We still don't know the output even after being asked.

Why would someone stick a 6v on a 12v vehicle. Maybe its missed marked.
Patrick L. is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Sponsored Links (Register now to hide all advertisements)


All times are GMT -5. The time now is 09:53 AM.