I need A Wiring Diagram for 12-volt alternator Conversion

Farmall Super A, AV, 100, 130, & 140 1939 - 1973

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Bill Hudson
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I need A Wiring Diagram for 12-volt alternator Conversion

Postby Bill Hudson » Sat Jun 19, 2021 7:34 pm

Folks,

I've searched for a wiring diagram for an A 12-Volt alternator conversion (distributor ignition), to no avail. I fairly confident that such a thing exists, however, I haven't been able to find it. Any help for finding it would certainly be appreciated.

Thank you.

Bill
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Re: I need A Wiring Diagram for 12-volt alternator Conversion

Postby Bill V in Md » Sat Jun 19, 2021 7:52 pm

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Re: I need A Wiring Diagram for 12-volt alternator Conversion

Postby tst » Sat Jun 19, 2021 9:35 pm

try this, depends upon what alternator you are using, this is for use with a delco 10
Attachments
alterconvert.gif

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Re: I need A Wiring Diagram for 12-volt alternator Conversion

Postby Cub-Bud » Sun Jun 20, 2021 7:29 am

I need to complete the 12V conversion on Landon's "49. Can someone give me specific info on the diode (part #) and a source, please :?:
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Re: I need A Wiring Diagram for 12-volt alternator Conversion

Postby Dale Finch » Sun Jun 20, 2021 7:38 am

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Re: I need A Wiring Diagram for 12-volt alternator Conversion

Postby Gary Dotson » Sun Jun 20, 2021 8:14 am

As you can see from Dale’s post, diodes are cheap and readily available. Her post lists a lot of 1 amp diodes, for durability sake, I prefer a little heavier capacity. The ones I currently have are 4 amp, still cheap, still readily available, just larger with heavier leads (still pretty small, though)

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Re: I need A Wiring Diagram for 12-volt alternator Conversion

Postby Dale Finch » Sun Jun 20, 2021 8:40 am

I am following this, Gary... a friend has a Cub that keeps draining the battery. It has a 12v conversion, & when I first heard that this could be caused by the alternator, I took the alternator to a shop to be tested. They said it was good, so I'm thinking maybe this diode is the solution.

Do you think the diode might help? Which diode do YOU recommend? Do you have a number for it? Thanks, and sorry to hijack the thread, but maybe it will help others here.
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Re: I need A Wiring Diagram for 12-volt alternator Conversion

Postby Gary Dotson » Mon Jun 21, 2021 8:12 am

That depends, if it’s a one wire hook-up and draining the battery, the diode won’t help. If it’s a two or three wire, it may possibly help. First thing, see it it drains the battery with the alternator disconnected, that will help point you in the right direction. It may be something else, entirely.

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49 Leader "D" (Princess)
49 Leader "D" very rough
48 Leader "D" unrestored
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Re: I need A Wiring Diagram for 12-volt alternator Conversion

Postby Gary Dotson » Mon Jun 21, 2021 8:19 am

Oh, I have no specific part number, I just googled 4 amp diode, found them 6.99 for 20 of them, free shipping.


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