92 Lexus Ls400 Problems

[Ls400rules]

I own a 92 lexus ls400. We just put a new altenator in it. But nothing is charging correctly. I have to rev it up past 4000 rpms just for the lights to dashboard to kick on, the radio isn't working. Let me know if you know anything.

[landar]

I own a 92 lexus ls400. We just put a new altenator in it. But nothing is charging correctly. I have to rev it up past 4000 rpms just for the lights to dashboard to kick on, the radio isn't working. Let me know if you know anything.

I know nuthing, nuthing atall.

Seriously, you left a lot out of the story. Such as why you decided to change the alternator in the first place(PS pump leaking?). The main things to check and double-check...the belt is on and good tension, right? And all connections to the alternator are ok (clean, shiny, tight). Remember there is a rather large positive (+) wire to the alternator. And the alternator MUST be properly grounded. Check those carefully. Make sure that your battery connections are good.

Now for the probing question: You did not, by any chance, forget to disconnect the battery before pulling the alternator and saw some sparks, did you?

BTW, welcome to the forum!

[steve2006]

Oh no not that easy to get to 80 amp fuse problem caused by those sparks!