I have 2002 lexus is300 and today out of nowhere after putting gas, my engine started right up but none of the electronic stuff worked, gauges , gas level , radio. Nothing eletronic works now and it wont let me shift into drive enless I press the over ride button on the side. Then the car drives fine but still no electronic s working? Is it a blown fuse or something?

SOURCE: Temp gauge shows hot even if engine has been off overnight?

Locate the temperature sending unit and pull the wire off of it. Turn the key to the on position (do not start) then have someone touch that wire to a ground source and the temp gauge should go from one extreme to another (cold to hot). If the gauge does that, you have a bad sending unit...if it does not move, you have a bad gauge or problem with the wiring to the gauge.

All the temp sending unit does is act like a variable resistor depending on the coolant temp...if it is bad, it will give you a false reading.

SOURCE: started out with headlights out then the speedometer, odometer, gas gauge, oil, battery, rpm's are not working, fixed the headlight was a fuse but other stuff still won't work.

sounds like your missing a ground somewhere.

SOURCE: radio and windows gas gauge not working

Did the sun visor have a light up make-up mirror? If it did I'm guessing that the wire or wires that went to it are now shorted out, either to each other or the metal car body. Try to get at this wire or wires and apply electrical tape as insulation. You can probably check in your owner’s manual to see it the make-up mirror shares a fuse with the radio windows and gas gauge. Re-check that fuse to make sure it's not blown. Also check to see if there is a fusible link that may be blown. Maybe the short in the make-up mirror is not pulling enough current to blow the fuse but enough to drop the voltage and mess up the function of the radio, windows, and gas gauge.

SOURCE: I drive a 2000 cadillac catera and when I shut the car off, when i turn the car back on, none of the controls for the radio, sometimes the trunk lock button, fuel tank door button will work. Then afte

K134 Multifunction relay.

SOURCE: no dashboard instrument or gauges working or wipers or indicators

did you check the 2 multiconnectors on the back of the dashboard, normally they are fitted with bolts, when bolts ran out you wil loose all info and lamps. good luck