1994 Saturn SL2 is my new alternator bad

First of all thank you so much for your donation.It sound's like you have a another bad alternator.But let's check a few thing's with the car idling what is the voltage at the battery cable?Also you should have battery voltage to the stud the fuse link goes too.Also on the connector to the alternator you want battery voltage going to the brown and white wire if you have those two things and the alternator is spinning then you should be charging.Let me know what you find.

Your welcome -thank you for the prompt response !At battery cable voltage is same 12v. The stud the fuse link goes to; are you refering to the wire on the back of the alternator with the boot cover? If so thats also 12v. (Same when engine is off) I was unable to check the brown & white wires tonight as I put evrything back together( I dont have a lift or sturdy jack so I tested through the wheel well )but the alt is spinning and the tension on the belt is good. Shouldn't I be seeing a voltage increase to about 14v at the alternator if it was charging or would that only show at the battery? When I remove the neg from the battery while idling she dies.[/Quote:7d247d84fb]Yes the wire from the starter to the alternator with boot. With it running that fuse link should have close to 14 volts that is correct. You should also have power to that brown and white wire to the alternator with the key in the run position. If you have all that it should be charging. So let me know what you find.

Your alternator isn't charging if you have 12 volt's at the battery with the car running. If you have battery voltage to the alternator stud then we know the fuse able link is good. If we test to make sure the brown and white wire has power to the alternator with the key on engine off then we know it's a bad alternator.I would just hate to see you take out the alternator and have it be no power to that brown wire. Your going to be there anyways if you replace the alternator. Let me know what you find.

Yeah looks like your going to be changing it out again.As far as new compared to rebuilt i would just stick with the rebuilt where did you get your alternator from?You did very well with your first alternator i used to replace them all the time under warranty when the cars were still under warranty they were a piece of junk till saturn came out with there rebuilt ones and they were better then the new one's lol.They even had a better warranty the new one's that we sold had a 12,000 mile or 12 month warranty and the rebuilt one's were 3 year or 36,000 mile warranty if we installed them at the saturn dealer.I posted the trouble tree for battery light inop for you.

Glad you got everything working again and that you enjoy our site that's what we like to hear. Thanks again for the donation and thank you for using 2carpros.