These "tools" are at autozone
Uv oil dye pn: 374
Uv leak detector pn: 438 or 439
438 has yellow glasses and a uv light, 439 is a different light, 374 is the dye. Usefull for gas and oil.
As far as the condensation on the inside is concerned, the seal around the headlight has a leak. Remove the headlight, "dry" the inside with a hair dryer. Use a glue of some sort from an auto parts place like autozone. I used "GOOP" last vehicle I did this to. Messy like rubber cement and should...
I'm going to be getting my dads 94 ls400 soon and am going to engorge my brain with as much data and knowledge as I can stuff inside, with breaks taken for work, and the wife and kids. Hope to contribute where I can.
Thanks,
Bill Z