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Figured lol, im battling some similar issues now

Did you figure this out?

And people run without that? Just a "raw" alternator?

Which shroud are you talking about? I am talking about the one that bolts directly onto the back of the alternator.

So drove it around, so far so good, buttttt stupid mistake forgot to transfer the plastic shroud that pushes that air into the other shroud to keep alternator cool..... Soooo might have to pull it, again.

Thank you! I always seemed to find dead end threads with no solutions, so I thought I would keep posting. I hope it's the final solution, but I'll stay posting!

New alt is in, fully charged battery was at 12.59V when car was off, and 13.9v running with load. Then drove around for about 20 min, 12.95V when parked back at home. Got it up to temp, everything seems to be good as of right now. Will keep posted after driving more today and tomorrow.

Also dropped off battery to get fully charged and then tested, have new (well rebuilt) alt in hand. Edit: tested on bench with the "autozone tool." battery is fully charged and test said it was fine.

Currently heading to go get an alternator. I can bite the restocking fee if it doesn't fix it.

I've been searching for a diagram, can't find much... edit: found this

Mine has a year, warranty and yes I tested it at oreilly and the place I bought it. Both said it passed. The alternator shop where I bought it from tested it and said it was outputting 15v, but couldn't test the regulation part (bc its ecu regulated). So I am not sure. We tested yesterday on the...

According to the alternator manufacturer, the bench tests do test the regulators when being bench tested, but should I buy a new alternator and just hope for the best??

That's my guess and hope, belt was just replaced too, got a new one but tried with all our might to get it on and it was just too tight, so I am not sure if there's a trick for these gen 1 speeds but had to leave the old belt on there. Well if the alternator solves the problem, I will probably...

This is a rebuilt alternator from copperstate alternators (https://phoenix-alternator.com/MPartDetails.aspx?IDNum=51034) and it's only 6 months old. (2007 MS3 $140.11 alternator)

To be honest, I still don't know what's wrong. Alternator works for a bit when battery is charged, but turns off after a few minutes. I'm not sure what to do at this point, running out of hope.

Yes, they were, once the vehicle was up to operating temp, the alternator stopped working. Tried to reset the computer by unplugging battery, and as long as the engine was warm, the alternator did not work. We checked voltage at alternator and at battery when the moto was cold, it was at 13.9v...

Checked grounds. Alternator body to motor mount ground, alternator body to negative terminal, negative terminal to body. Checked from positive alternator to positive battery, all good. Checked from positive alternator to body alternator, high resistance, so good. Checked truck battery, 12.2v off...

Just another battery? Or one meant for the speed? And how would I use another battery to test (I'm not very electrically inclined)

So the regulator is built into the alternator, but its regulated from ecu? And yeah, it seems that the problem is when the motor is hot.

For the battery, it was a quick test, but I can go drop it off for a bench test if needed. The alternator was tested on and off car. Failed on car (wasn't charging battery) , passed off car twice. I will have to check all the wiring, as that is my next step at the moment. Thank you.