86.5 Supra Low Voltage

[Busted Knuckles]

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.