The FSM says faulty ACG. So i guess new alt for now.

Shady. where is the batt fuse?

I replaced the Alt. the 18= volt went away. but still no charge. ran a wire from Batt terminal on Alt to battery. it seems to be stable. but at throttle only 12 volts. under full load. 10. and the lil red light is always on.

Where are you getting these alternators from? Are they stock replacements? Have you had them check it on the machine before installing it?

stock replacement. new(rebuilt) this car has so many wireing issues.

the battery has fuseable links in that little black box by the battery. the reason it is saying low voltage after that wire is installed is due to the fact its back feeding to power the dash stuff. there are 2 wires connecting in the harness by the battery. they are 12 ga. and white. if you follow the wire from the alt. upward, you will see the juction near the batt. its kinda hokey and usually corrodid. i took the white wire from under the dash and routed it to my maxi fuse panel under the hood. that way it feeds straight from the battery. then the alt only has one 4 ga. wire up to the batt via a large 120 amp breaker. i wish i was better at pix, but i could draw the thing up for you.

Ahh. I don't have Fuse links anymore. I installed a 98 pontiac box. it has maxi fuses. i have 3 60's and 2 30's. there all good.

i wish i had one more spot, mines only a ebay 4 fuse holder, used to have a digital readout, until my alt hit 18v and melted the readout

mine is cool. 5 large. 9 small. bottom pops off for all the accses to wires you need. it's long. and not sqaure. has a shunt plug. pull that out. all the smalls loose power.

dang take some pix

tomarrow i'll post a pic.

6 small. srry been awhile since i've actuly looked at it.

cool, it looks factory too!

94-99 grand am's should have them. i should of mounted it parralel to the fender. but space is limited with such a bigg fckin battery

GM 1 wire alt in for over a year and running strong. The alt doesn't charge unless the rpm is over 860. Very easy install too.