Does your Bat warning light stay on or if you have a Voltage gauge what does it read. Was your battery fully charged before you installed your new alternator? Remove alternator and have it tested to besure that it was indeed the problem.
you may have a bad battery or a bad voltage regulator
A person can get a diagram of this vehicle's alternating and charging system for free by owning the cars maintenance manual. A person can also ask for a print out from a technician at a auto part store.
Check the Battery and cables and if it's not that it could be the alternator.
The alternator is over/under charging.
Yes, it does.
The alternator is under or over charging.
Insufficient charging from your generator (aka alternator).
Normal charging range is 13.0 to 14.5 volts
Your alternator is not charging or the battery is very low
I'd be willing to be 1 dozen glazed doughnuts that these alternators ARE the same.
alternator is probably not charging. you need to fix this NOW. new alternator is likely the only repair.
Problem with your alternator, possibly the diode pack or brushes. Remove them, (Can be done without removing the alternator) New unit for this is about $30 .