Replaced altanator starts up but dies shortly after

What is your question?

1996 lexus ls400 When I start the car or starts up I drove it to gas station then it dies jump it off when I take off the jump cables car dies when instep on the drake to shift the altanator is good when tested. No noises or leaks

What makes this problem better or worse?

Nothing

How long has your 1996 Lexus LS400 had this problem?

Month