Having problems with your 1994 Isuzu Rodeo ?
Put a new alternator in.still not charging battery
If your old alternator was shorted, it may have blown fuse #8 in the instrument panel fuse block. It is a 10 Amp fuse and is the ignition circuit feed for the alternator.
Did you use a new or rebuilt alternator? Junk Yard ones can be cheap but a roll of the dice as well. You put a new or re-manufactured one on you say, did you replace the battery as well? Alternators that do not charge a battery properly can ware down the battery quick. Even a relatively new battery can be ruined if an alternator wears a battery down enough times. This would be my recommendation at this time. Try a new battery. Good luck to you.
Repair Help & Product Troubleshooting for 1994 Isuzu Rodeo
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