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Old 04-22-2016, 11:06 PM   #6
Art Newland
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Join Date: Mar 2016
Location: Lynden, WA
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Default Re: Fuse in headlight harness

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Quote:
Originally Posted by Y-Blockhead View Post
Art, Just put a fuse/circuit breaker in the yellow wire from the generator cutout/alternator to the light switch as I did in post #2. That will put a fuse in the lighting circuits (headlight, tail light, etc.) I have a 30a circuit breaker for the main and 20a for the lighting.
That's not a bad setup, but what I don't like is the ignition system (and maybe a dome light) being fused for 30 amps. Say you had a circuit, shorted to ground, in your instrument panel. But was only drawing 29 amps.The poor little wiring would not last long. An energized coil pulls about 4 amps, so the Model A's electrical doesn't need to be fused for 30 amps... until you turn on the lights. Certainly adding a fuse at the starter switch is a good start. I know I'm overthinking this, Model A's have done fine for 80+ years, but I bet there has been a few go up in smoke.
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