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12-24-2023, 02:26 PM | #1 |
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Join Date: Jun 2014
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converting a 12 volt alternator to a 6 volt positive ground
I watched Paul Shinn's video on changing a 12 volt Alternator over to a 6 volt Positive Ground. I purchased the kit and installed it. When I put it on the car it blows the 30A fuse when you install the fuse which tells me there is a short in the Alternator.
Can anyone tell me what to look for when I disassemble the alternator to pinpoint the short? I feel I put it together correctly. Also this is an alternator I picked up at a yard sale but it looked OK. With the wire off the Alternator, can I connect a test amp meter or volt meter to the one pole and test it for short or if it is putting out? |
12-24-2023, 03:30 PM | #2 |
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Location: So Cal
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Re: converting a 12 volt alternator to a 6 volt positive ground
Maybe the diodes are backwards.
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12-24-2023, 03:44 PM | #3 |
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Location: California
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Re: converting a 12 volt alternator to a 6 volt positive ground
I agree with Bob C. Sounds like the diodes are backwards, or perhaps they sent you negative ground diodes by mistake.
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12-24-2023, 07:38 PM | #4 |
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Re: converting a 12 volt alternator to a 6 volt positive ground
I don't know how many outfits put these kits together. Quality control may not be all that good. The diode bridge should have identification on it. They use a jumper wire as well. The GM 10si is the most common unit. I've not done any others.
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12-25-2023, 08:15 PM | #5 |
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Location: on the Littlefield
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Re: converting a 12 volt alternator to a 6 volt positive ground
Some I have seen the diode group is isolated from the case and a jumper to the case is used to make either positive or negative ground, the regulator determines the voltage
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12-26-2023, 09:26 AM | #6 |
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Re: converting a 12 volt alternator to a 6 volt positive ground
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12-26-2023, 12:49 PM | #7 |
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Location: North Carolina
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Re: converting a 12 volt alternator to a 6 volt positive ground
If the alternator was good, why was it at a yard sale? I would say it is a core for trade-in on a rebuilt alternator. Take your kit out, trade the core in on a rebuilt alternator, and then re-install your kit in the rebuilt unit. This assumes you did not fry the kit by installing it the first time.
W. Michael |
12-26-2023, 07:07 PM | #8 |
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Join Date: Aug 2012
Location: Texas
Posts: 232
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Re: converting a 12 volt alternator to a 6 volt positive ground
I looked for the kit to do this, but none of them have the pulley necessary for the wide belt used on the Model A. Anybody have a source for the pulley only?
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12-27-2023, 02:21 PM | #9 |
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Join Date: Jun 2010
Location: San Antonio, Texas
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Re: converting a 12 volt alternator to a 6 volt positive ground
A person would likely have to purchase a wide belt pulley separately. They are available.
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12-27-2023, 03:31 PM | #10 | |
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Re: converting a 12 volt alternator to a 6 volt positive ground
Quote:
I think most of the vendors have them. https://www.snydersantiqueauto.com/p...6053&cat=41710 |
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