Hello, this is me first post here. I have a 92 ES300. The door-open indicator light on the dash will not go off. Does anyone have any ideas on what the problem might be and how to fix it? TIA

Sounds like...
 

it might be the one of the pin switches for the doors. I don't remember if they can be removed right in that spot or if you have to take off all the trim and get it from behind. If you can you just need to see it the power going back to the dash turns off when the pin is pressed. Unfortunately, if you have to go through the trouble of removing all of the trim you may have to do it 4 times. Try posting in the maintenance forum, one of the guys that frequents that is a Lexus Tech I think.