Generator Light
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More Turbo
Joined: Jun 2003
Posts: 687
Likes: 80
Generator Light
I installed a GM three wire, internally regulated alternator in my '56 with 292. It works great. The funny part that I can't work out is that on initial start up, the generator light will stay on until rpms reach about 2,200 to 2,500 rpms at which point it will go off and stay off unless the rpms drop below 400 rpms or so. It really isn't a problem as I can make it go off by revving the engine once in the morning, but I am wondering about what is going on here. I don't think the alternator is at fault- is it the lamp itself?
Steve
Steve
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Joined: Oct 2004
Posts: 15,882
Likes: 88
From: Durham NC
altho an alternator does produce output at low RPMs, it is a relatively small current. I suspect it takes a higher current to trip your lite off than what it sees at idle.
Put an ammeter on the output wire and see what it's reading.
Put an ammeter on the output wire and see what it's reading.
