Reproduction Parts for 1916-1964 Chevrolet Passenger Cars & 1918-1987 Chevrolet & GMC Trucks



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Backyard Mechanic
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Backyard Mechanic
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I have a 6v generator. Currently the only addition I have made is fog lights. I would like to add the following: Turn signals, radio (might be a USB speaker that I can make run off of 6v and hide in the dash), and a lighter socket to power USB like my phone.

Any ideas of what the output of the generator is? I want to have enough of a margin so there is no chance of having an issue. All of the lights are basic incandescent.


I have found that having an old car is a constant project that is never done. I think that is a good thing. Keeps me learning new things. Having two from different eras is just a form of higher education.
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Hall Monitor
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As long as the energy requirement of your accessories doesn't surpass the output of your generator you should be good to go. If this is on your 41 you need to stay under 40 amps total draw.

Last edited by Tiny; 02/17/22 12:42 PM.

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Tiny is correct that the maximum generator output in a ‘41 is 40 amps at 72 degrees air temperature. As things get hotter the output will drop about 10%.

My estimate is that if you have the heater and defroster fan motors running, the headlamps on low beam, taillights, and the fog light on you are over 40 amps in load. The real question is how often will you drive in conditions that require that much load. Turn signals and brake light will defiantly overload things.

Remember that a generator provides no output at idle.


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My 1950 has the same generator. The ammeter will stay on the plus side with the head lights on. the radio, heater and fog lights.


Gene Schneider
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