86.5 Supra Low Voltage
 

My car died with the battery light & brake light on,muffeld radio playing and no wipers. I guessed the alt went out, I purchased a new one as well as a new battery. I installed the new parts and the car won't hold a charge, I returned the alt for a new one benched checked it...its good. the car won't charge its putting out 12.5 volts with a load and 13.1 without a load.
CAN ANYONE PLEASE HELP ME, IM HAVING TO DRIVE THE FAMILY VAN

Wth the new alt in place, are the lights still on? Are you checking this with the gauge on the dash, or with a calibrated multimeter? I found my gauge tends to fluctuate with the load, like it will drop .5V sometimes when I put it in reverse, and activate the back-up lights. Also, when driving at night when raining, the gauge may drop to 12V even. The first time this happened, I grabbed my multimeter, and found the charge was a strong 13.5V at idle with the headlights on.

Low Volts
 

When the car is idling its reading 12.6v,after searching I believe I found a short in the alt fuse socket.I will trouble shoot that next. Thanks for the help. Storm