Thread: Help wiring GM alternator to Altmeter

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Originally Posted by rdobbs

Would like to know proper way to wire the alternator to a altimeter. The alternator has one big post and two prongs. Thanks

An alternator to an altimeter? That's a new one..... Looks like the dreaded AutoCorrect may have worked it's magic?

Originally Posted by rspears

An alternator to an altimeter? That's a new one..... Looks like the dreaded AutoCorrect may have worked it's magic?

Rdobbs, I wasn't trying to be a smart a$$, it just struck me funny to see "altimeter" given my old NavAir background. I'll offer that the old school Amp Meter is not seen much any more, nor is the charge/discharge "idiot light" that replaced it. A Volt Meter is used more often today, and really tells you more about the overall health of the electrical system than the old Amp Meter, IMO.

Already have a volt meter. Excuse me for not properly identifying the
gauge. I knew I was doing something wrong. By the way I'm 72 years
old, just trying to help my son out, and am taking medicine for altimers.
so my mind isn't what it use to be. Thanks to all.

Thanks Denny. I think this diagram should do it. My volt meter
only shows about 11.5 volts with engine running and that sounds
a little low to me. My wanting the amp meter is exactly the reason
you have one. I've wired several of these amp meters in my day
on cars and tractors, but just out of practice I guess.