What causes the gas gage in a 1994ls 400 lexus not to work

Which dash lights blink, do they blink with engine running or just ignition on. First thing to check are battery condition, is it able to supply required volts and current if not sure have it tested by your local auto shop. Make sure all connections at battery posts are clen and TIGHT, I emphasize tight many people overlook this simple thing and begin chasing their tails. Hope this helps you.

secondary fuse box, sounds like the assesory fuse is blown

chk the gas drum under the engine

mine did the same thing. Replaced the computer fixed the problem. Rebuilt one
worked fine.

HI, this is a malfunctioning sending unit that is located inside he fuel tank. this sending unit, transfers a Resistance signal to the gauge, in return, allowing you to see how much fuel is in the tank. if this mechanism becomes corroded or, damaged, this will cause the symptoms you are experiencing.

This damage is usually caused by fuel deposits left behind overtime. the modern day fuel we use can destroy sending units because of all the detergents and, nitrogen cleaning agents put in the fuel at the refinery. this is goo for cleaning out the rails and fuel injectors but, it usually can hurt the sending unit mech at the same time.

The fuel gauge sending unit is attached to the fuel pump Assembly. you will have to remove this assembly from the tank to replace it. the tank has to be lowered as well.

if your talking about thew gas gauge it is in the tank.

you must open the fuel tank and pullout the sensor which is mostly a float with a variable resistance and recalibrate it . so i think you shoul see a mechanic

you can get to part of it from trunk and the rest of it threw the rear seat.

Hi.....
On your 91 Lexus ls 400.
If you remove the Rear passanger seat.
You will have axces to the fuel pump.
Remove the metal cover . Disconnect the wire harnes,
Disconnect the lines.
removing the nuts you will able to remove the fuel pump.

Ok.. I hope this help on your question.
Thank you for use fixya...

i can usually fix these for very cheap $...call 508 822 4490