Z-28, New Alternator and Battery, Sporadic Charging
I bought a 1986 Z-28 that someone put a nice 350 in. When they did it, they eliminated all the sensors (just like the good old cars) and left a massive amount of wiring harnesses taped-off. The alternator was putting-out 10 volts (bench tested) so I got a new one...I also put a known good battery in it. I started it up and the volt meter read 13 volts, thought I had it fixed. When I drove it, everything electrical was draining, and with the headlights on, the turn signals barely clicked...obviously not charging. I stopped, put it in neutral, and 13-volts once again. Drove it and it dropped to 8-10 volts. Battery terminal posts are clean and so are the cable connections. The alternator is charging, sometimes. Sound like a ground?