Alternator being shorted out.

I have a 1998 Suzuki x90. Something is shorting out my alternators. I'm on my 10th brand new one. It starts to squeal on start up, soon all the time as from past alternators. When driving at night the lights get dim I avoid high beams, air bag light will come on, soon dead car. We have extra ground wires attached. Battery is new so not that. I am thinking short in headlights. Electrical for sure.
Any ideas, suggestions ??
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