why is it frying the electrical ???

yeh i would just take it to a mechanic that specalizes in electrical problems,,, probably something simple like tennishoes stated but tracking that simple problem/fix is the hard part, unless your good with electrical then have at it, but i assume that since your asking us your not,,, maybe just do a look yourself and see if you can find any connections that don't look right and make sure that the battery connections are clean and tight and get the battery checked as well,,, from there i don't know what to tell ya

i am gonna get a chilton repair manual for it. and i looked at all the grounds and fuses i could and chased the positive wire for a bit and didn't find any thing odd could i have some thing to do with the vent fans that have never worked ??? thank you again for all the tips they are very appreciated

I have had the same problem with my 2000 montero sport. I was told this week to replace the upc valve that is above the alternater, they leak and ruin the alternater.

That happened to me too. 2 alternaters and 3 batteries later my friend found one of the main grounds was not connected.