on the exhaust
Call OnStar
it is located in the fuel tank
dexron 3
got to this website to find out http://www.md-cars.com/uploads/content/company_Toyota/ES250.jpg
same as a toyota, same as any car go to your public library and look up the step by step instructions from the manual there
== It's the medium sized black box located under the drivers seat...
go to this website http://www.carstereohelp.com/stereoremovalLexusLS400str.htm
you should be able to find a shop manual at the local library with the right information on this -- make copies of the pages, as they are usually for REFERENCE only...:)
Radio in 1990 Lexus LS400 stopped working, possible answer?
Remove the retaining ring from the top of your 1990 Lexus ignition switch. The ignition switch will slide out. Remove the wiring harness.
replace upper radiator hose and install a new thermostat. see what happens. or turn it on without the thermostat for a while and see if it still overheats.