Hi,
I have an 88 GTA 5.7 I have a low voltage condition, meaning the car runs at about 9 or 10 volts now, and is going down slowly. Started reading lower and lower a few days ago. I think I must be running totally off the battery, although the battery tests currently at 11 volts ( even though the dash guage says 9 or 10). Soo, where do I touch hook up my voltmeter pos and neg pins to the alt to test it with the car running ? I have the 3 pin connector. There are 4 holes in the connector, but only 3 pins in it. The wires are red, yellow, and brown.
I'll prob take the alt out, to autozone to test it, eventually, but I'd like to test whatever I can myself first.
Thanks