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10-08-2015, 09:32 AM | #1 |
Member
Join Date: Oct 2015
Location: Shippensburg, PA
Posts: 48
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Generator testing and wiring
I've inherited a 1930 Model A that's been partially restored. I've replaced some of the wiring (including the yellow/black to generator) and got it running, but need to understand the generator to get it charging. I'll likely take it to a local shop for testing/repair, but would to test/fix myself if possible. I really don't understand continuity, which wires to test and how, or even how the generator gets wired to the car. Can anyone offer help in very basic terms? Thanks all!
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10-08-2015, 09:41 AM | #2 |
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Join Date: Jun 2014
Location: Rocklin, CA
Posts: 779
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Re: Generator testing and wiring
If you have the generator off the car a simple test is to hook 6 volts to it and see if it motors (runs like an electric motor). If it does then when hooked up it will generate but you will need to make sure the cut out is correct the wiring is correct and that you have polarized the generator to the car. All of the instructions for wiring are in various books. The motor test is the simple one I use to see if the generator needs to be rewound etc.
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10-08-2015, 09:51 AM | #3 |
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Join Date: Oct 2015
Location: Shippensburg, PA
Posts: 48
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Re: Generator testing and wiring
I'll try that, but how/where do I hook the battery? In the picture I included, you'll see that the generator has 2 wires coming out of it, instead of a terminal post. I'd like to test it first, then order anything I need for a proper connection/repair.
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10-08-2015, 10:14 AM | #4 |
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Join Date: Oct 2015
Location: Shippensburg, PA
Posts: 48
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Re: Generator testing and wiring
Ok thanks. So when testing with a 6V battery to see if it motors, I connect the positive terminal to the grounded screw and the negative to the cutout armature side?
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10-09-2015, 12:52 AM | #5 |
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Join Date: May 2010
Location: Mpls, MN
Posts: 27,582
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Re: Generator testing and wiring
Correct, and it should spin slowly in the same direction it will turn when mounted on the engine.
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10-09-2015, 05:13 AM | #6 |
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Join Date: Oct 2015
Location: Shippensburg, PA
Posts: 48
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Re: Generator testing and wiring
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10-09-2015, 10:46 AM | #7 |
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Join Date: Oct 2015
Posts: 1
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Re: Generator testing and wiring
I have 1929 Model A. The generator bench tests at 7 volts. When on the car the voltage jumps from 2 to 10 volts constantly. I jumped from the battery direct to the positive side of the generator same result. Please help.
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10-09-2015, 12:19 PM | #8 | |
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Join Date: May 2010
Location: Mpls, MN
Posts: 27,582
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Re: Generator testing and wiring
Quote:
To decrease the output, you move the adjustable brush up. |
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