Belt noise

[Sals 03tj]

The harmonic balancer typically can be seen failing and the belt will wear on the outer edges more if it is-

Isolating with different size belts is a better diagnostic approach than a parts cannon.

I get the same thing on my YJ after installing a high capacity alternator and the battery is low or I have all the KC hilites on for a while. I carry a can of Belt Dressing along with a can of Wire Dry in the center console.

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[tr21triton]

when my belt gets to squealing like Ned Beatty in Deliverance this is what I use. also use it when them dang brakes start squealing too ! shuts them right up