alternator oddity

[jerrybromley]

So I am firing up my 67 bronco for the first time after a 3 year major renovation. I used basically stock alternator parts( 1G with a voltage regulator ) factory brackets
During break-in I had what I thought was a bad squealing belt.
After break-in I pulled the alternator belt and started it up there was no squeal. So I bought a new alternator and installed it. It had the same squeal as the original alternator...OK that's weird
To continue troubleshooting I removed all the wires from the alternator and put it back in and the belt back on.
This time no squeal
Is it possible the voltage regulator is demanding like 110% of alternator output and causing belt slip ?

 

[mrdrnac]

I'm also guessing a bad voltage Regular, but we'll wait for the experts!

 

[jckkys]

Did the amp meter indicate a high load output of the alternator? With a largely discharged battery, the amp meter reads the full 65 amps.

 

[jerrybromley]

Did the amp meter indicate a high load output of the alternator? With a largely discharged battery, the amp meter reads the full 65 amps.

Thanks for the thought but I don't have an amp meter ..only volt meter . But I did have the charger on it earlier, to make sure I had a full charge.
I was awake last night thinking about this ( imagine that ) and it occurred to me my entire engine bay is coated with Raptor liner, perhaps my voltage regulator may not have a ground . Hmmmm
I can't get to it today, but I will continue checking this problem out tomorrow

 

[jerrybromley]

So if you had asked me a week ago if I had put a ground on the voltage regulator I would have said " Sure ! " :-[:-[:-[
Yes, I forgot the ground to the regulator
I am how ever amazed at the out come of that mistake . That belt was screaming bloody murder . Well I won't forget that.
:-[Thanks for the input guys !

 

[DirtDonk]

In addition to the regulator grounding to the body normally, it is also grounded directly to the alternator. In the factory harness it's just a small ground wire between the body of the alternator and the one of the regulator's mounting bolts.
Even with it grounded to the body then, it's still a good idea to have that common ground between them.

 

[jerrybromley]

Thanks for the advise Dirtdonk ! I will add that ground .
So weird the sound that it made had me in the engine bay with straight edge checking belt alignment . But when I unplugged the voltage regulator and the sound went away I knew it was electrical not mechanical.
Another oddity was as I was making carb and timing adjustments I used a hot wire and remoter starter switch ( just so I turn it off and on from the engine bay) and the alternator did not make a sound ?:? LIVE AND LEARN

 

[Boss Hugg]

?:? LIVE AND LEARN

You can say and think that, but over the years, I've found myself chasing a problem with lack of starter engagement when I hit the key. Each time it traces back to shifter not being in park. ����

 

[jerrybromley]

Thanks Boss for letting me know I ain't the only one