We have an 2004 recently purchased Lexus es330 bought used?

Question edited for clarity.
Question moved to model category.

I have the same year and model Lexus. I bought it in 2007. Great car.

Wiring diagram in the link. It should have come complete, remove the old and install / connect the new one.

https://www.google.com/search?q=2005+lexus+es330+alternator+wiring+diagram

..

In every vehicle ever made?

Google

year make model fuse box diagram

It's the first link, here is mine.

Fuse Box Diagram Lexus ES300 / ES330 (XV30; 2001-2006)

https://fuse-box.info > lexus > lexus-es300-es330-xv30-...

Fuse box diagram (location and assignment of electrical fuses and relays) for Lexus ES300 / ES330 (XV30; 2001, 2002, 2003, 2004, 2005, 2006).

Fix your car right away, by clicking the link
2004 Lexus Es330 Workshop Service Repair Manual Software

Under package shelf - basically you would nearly need to crawl into the trunk, then flip over to be facing up in order to see it... (a decent sized mirror could also be used).

1st google hit
http://www.clublexus.com/forums/es300-and-es330/603269-2004-es330-key-replacement-story.html

pull the cluster of and se whats making the noise

May be bad battery blocking the power to the car Remove and replace the battery and see what happens

Is there somehting wrong with it or did you recently have an oil change done or something?

Any OBD2 reader should work. the OBD connector is under the dash just forward of where the drivers knees would be. I think most ALL cars are within 18" of the steering wheel.