Ok here is the scenerio. 87 GT. Voltmeter reads most anything. Usually wants to read very very high . I can turn the key to accessory and stay there for a few and then restart the car and the meter reads anywhere from low to mid range. Once the voltage is down in the mid range or even the low range it is happy to stay there. Heck even on a few occasions the meter has gone off scale in either direction. I have checked the voltage with the car running and it is always at or near 14 volts at the battery with a digital meter. So bad meter? ground? alt? wiring? any help to be found? thanks
If the voltage on the meter doesn't correlate with the volt guage reading I would say the guage is bad. First, though, check the voltage at various places in the harness, a loose connection somewhere can cause voltage drops downstream from there while the battery voltage doesn't change as fast.
