bad alternator cable/corrosion bad battery
Dead Battery. Are you sure your battery can maintain or hold a charge?
Yes, the computer is the voltage regulator.
Not likely, but running the engine with a dead battery can damage some alternators. Always fully charge the battery when installing an alternator.
regulator is bad inside alternator
Loosen the belts, unbolt the old alternator, bolt the new one on, tighten the belts back up.
put in new alternator but it will not charge battery. alternator was tested and found to be good. why wont it charge the battery?
Voltage regulator or loose wire.
is your battery Low or poor?? Charge your battery on slow charge for 8hrs to give it a good deep charge, Installing an alternator on a low or dead battery will ruin it and also not charge your battery properly.. An alternator is not a battery charger its a battery maintainer!!
i have changed the alternator and voltage regulator and it still wont charge ; 84 Plymouth reliant
Some new alternators will not charge unless the battery has a full charge already.
Repair the alternator to battery connections or replace the battery.
My advice is to charge the battery with a battery charger before starting the engine. You will be putting a heavy load on the alternator if you allow it to charge a dead battery. This could damage the alternator.