1990 Lexus LS 400 - Page 9 - Answered Questions & Fixed issues

Look for a vacuum leak

Coolant level is low

where is the location for the fan switch. my fans stop working when i start the air conditioner.

The location is Under hood, passenger side, front side of shock tower, mounted on top of fenderwell. Here is a picture of what it is that you are looking for:
Easy to get to and easy to replace. I'm afraid it might not be so easy on the wallet however. Do me a favor and let me know if you have any further questions about your vehicle. Thanks for rating my response and for using FixYa!

you need nothing but the fuel pump. Do not use sealers. But make sure you sealed everything good. I leak will make you fail a smog test in Calif

You either lost a bag or the line came loose.

She has whats call a parasitic drain. Something is remaining on or activated that shouldn't be. You can get get a parasitic drain test to verify this but i wont find the problem. Unless its like a light bulb or something you can visually see that's still on you will have to get it hooked up to a scanner to see what's staying on. You could always disconnect the negative side of the battery when you leave it for awhile if you don't wish to spend the money.

IF THERE IS ACCESS IT WILL BE IN THE TRUNK.

If the pedal is spongy you may still have air in the lines. If there are no brakes at all you may need to adjust the push rod for the master cyl. If the ABS has a fault it will set a code and the rest of the brake sys. will work normally

you need to find the source of the hissing sound. thats why it will not raise. you have a big leak.

Your keys are prob. worn. My car did the same thing until i got very expensive new keys made.

check your fuses would be 1st thing to do

if the smoke is related to the p/s leak it is a bad vaccum switch on the side of p/s pump. has 2 hoses going to it.the fluid goes into itake and burns out threw the engine exhaust system.

key and or tumblers are worn. need to replace one or both.

Faulty ignition switch. Replace

they are bad about pumps leaking into alternatorand shorting out .the high pressure hose from pump to rack and pinion are also bad about leaking. the racks will leak around 100k.

I don't have a 90 LS 400 so I'm not 100% sure this is what the inside of your car looks like but I think this will do it for you: http://www.lexls.com/tutorials/audio/headunit.html

Looks a little intimidating but it's not too bad.  Good luck!

Should be a release lever on the underside of the dash to the left of the steering wheel. It should be flush with the panel, so you might have to feel around for it. Hope that helps...!

The cable comming from the handle to the tank door is probably broken.

You have to remove the radio to get the serial number from the back, then you need to call an Infinity dealer, read them the number and they should be able to give you the security code.