I would assume this is an alternator issue or a wiring issue. Anyone ever had this happen before? I have a 92 sc300 and this is the first time i've seen this issue. Recently replaced battery as well. Any ideas would be great.

thanks

 

did u ground the alternator?

 

Its the alternator bro, mine did the same thing. Park her and replace that alternator wit a 100Amp one. Disconnect that Battery before you do it or you will end up having to find a 120Amp alternator Fuse.

 

Just happened to me on a 2 week old battery. Working on getting my new alternator as well. Do you also have a power steering leak by chance? That's what ruined mine.

 

Alternator. Ive gone through two already.

 

thanks for the advice, I have a spare bosch alternator lying around so I will get the alt replaced. Should I disc the battery while the car is running to see if the alt is actually the issue first before I get the alt changed?
thanks

 

Mine was a bad connection on the wire. Somehow the nut was backing itself off and the wire was just bouncing around. I put some lock-tite and two nuts on it and haven't had a problem (I took the alternator in and had it checked first).