'01 3.0 Elec. issue
 

My alternator went out a few months ago, battery light/trifecta. I replaced it with a Bosch reman that I screwed up (I didn't seat the plug entirely) but ran with a flickering battery light that would go away at higher RPMs or would come on and off at idle, with RPMs fluctuating. My A/C clutch started to melt that first run as well, I'm assuming from the voltage fluctuating. I let it sit and returned the alt for a Valeo reman, and it seemed to be fine after. I had replaced the coolant expansion tank that day as well. My battery (bought in July '23) died the day I installed it, so I purchased a new one, and it ran well.

Three days later, my upper radiator hose blows, throwing coolant everywhere. I replace it, and the next day, my battery dies. I'm not sure if the coolant may have killed the alt, or if the alt was a dud from the beginning and has been running on battery power since I installed it. I returned that alt and am getting my next, and hopefully last, replacement tomorrow. I got a multimeter as well.

I'm hoping to get some insight on this; this is the first car I've owned and worked on. It's been a blast to drive, and this forum has been a huge help in getting so many things done. This is the first problem i've had no success with. :(

Coolant is very likely to kill alt. All repair directions warn about getting coolant on the alternater

Welcome to the site. Oil dripping on it will destroy the alternator too. Mine was so bad. The dripped had oil all the way inside. A new steering fluid reservoir fixed the leak. The OEM hose clamps were loose due to old hoses.