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Old March 27th, 2021, 06:11 AM
biscaynebirdie biscaynebirdie is offline
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Join Date: Jan 2021
Location: Santa Rosa, California
Truck: 1965 1000 Series with 250 engine and SM420 transmission
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Default Re: Overcharging alternator and buzzing voltage regulator

Quote:
Originally Posted by Quigley View Post
I had the same problem with my 66 and put on two Delco voltage regulators and both made a buzzing sound and did not work. Bought a cheap electronic regulator from Car Quest problem solved and has worked perfectly ever since.
I’m almost wondering if they have the wiring mixed up in those reproduction regulators... It’s the generator field contact point that is buzzing, but this contact shouldn’t buzz at all. It should simply open when the engine is off, and close when the engine is started. I would have tried experimenting with mixing the wires around, but didn’t want to deem it non-returnable if something burned up.
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