There are several things to check for. Check the battery terminals. And there should be a wire from the positive terminal (+) directly to the alternator. There can be a fusible link. A fusible link is kind a fuse embebeded into the wire, in some point the wire gets thick. If you have no electricity in the car check the main big fuses, and fusible links. Check the fuses under the hood and under the dash. You may have a blown fuse. Hope this helps.
To hook up an alternator in a Chevelle, first ensure the battery is disconnected for safety. Connect the positive terminal of the alternator to the battery's positive terminal, and the negative terminal to the car's ground. Then, connect the field wire or the voltage regulator wire to the appropriate terminal on the alternator. Finally, secure the alternator properly and reconnect the battery before testing the system.
If the alternator is computer regulated it may not run with battery disconnected. The alt. may be good, but the wires to it are open/shorted.
A vehicle may not run if the battery cables are disconnected with or without a bad alternator. The best way to test an alternator is by voltage output when applying a load.
You have a bad battery. Keep that up often enough, and you are going to end up with a bad alternator. Alternator's don't like being operated without a load going to them. Running the engine with either of the battery cables disconnected is not good.
carefully with tools and the battery disconnected
Positively positive
WELL YOU MAY HAVE EITHER A BAD ALTERNATOR/CONECTION OR YOU ARE DISCONECTING THE NEGATIVE SIDE OF THE BATTERY FIRST. TRY DISCONECTING THE POSITIVE SIDE FIRST IT SHOULD THEN STAY ON.
voltage regulator.
To wire a one-wire alternator on a diesel farm tractor, first ensure the engine is off and the battery is disconnected for safety. Connect the single output terminal of the alternator to the positive terminal of the battery. Ground the alternator’s housing to the tractor’s frame or engine block, as it typically relies on a good ground connection to function properly. Finally, reconnect the battery and start the engine to verify that the alternator is charging correctly.
I think your alternator doesn't work properly.
If the alternator is not working the battery gets discharged. In most cars a light will show on the dashboard - battery light icon, and this will suggest fault in the battery or alternator. You will need to start the car and check if it is charging the battery, and most garages will do this check for you
You do not have to reset anything. but you should have the battery disconnected. and once you reconnect the battery it will reset your computer.