Is it possible that you hooked up some of the wires on the alternator reversed. An alternator has to be "exited" meaning that you need to put a little power in to it to get alot of power back out of it. If one of the wires you hooked to it was a "constant hot" (on all the time) and not a "keyed hot" (on with the key) the alternator itself can drain the battery. If you are sure this could not be it you're going to need to put a multimeter on the battery and pull and replace one fuse at a time until you find the drain. (It will stop drawing when you pull the right fuse) Be careful because the clock/radio is a constant drain but a very small. Save that fuse for the very last.
Something is on drawing power. Can be any light on the vehicle or a relay stuck.
Some possibilities: Cable is loose Alternator is faulty Some other electrical problem is causing an excessive drain. ---------------------- Also check the Fuse or Fusible Link. ----------------------- if new alternator: ck. mounting bolts for tightness & wiring. battery self maintenance? Alt. have intregal regulator? if not, should replace when replacing alt.
A short in the wiring.
Shorted diodes in the alternator.
The new alternator is bad happens all the time.
The vehicle should ave a voltage regulator. If the battery and alternator are good then the regulator is most likely bad.
alternator or bad wires
A raidator in need of a flush will not cause a battery drain.
Happened to my 97. The alternator went out. Had to replace it and get a new battery. No problems since.
Your alternator could be bad.
Bad battery, Parasitic drain.
dead cell in the battery or something is on pulling power from the battery.