Fuel gauge and speedo dose not work. h ave power to fuel gauge

Low battery voltage can do strange things to the electronics of your vehicle.

The sensor it at the end of the transmission, last one at the drive shaft. Drivers side. It most likely is that. could be wiring also. You need a multi meter that reads hertz to see if it is the sensor.

It may be that the speedo and temp are mechanical, whereas the tach and fuel are electrical. Check fuse for inst. cluster for clean and tight fitment. Check electrical connection at back of inst. cluster.

could just be the sensors so check them out with a automotive meter for feed to the tank gauge and then jack car up read for a low voltage output from the speed sensor and if they have power and appear to work then its a new speedo head --- ouch--- expensive

yes it is you can find some one in your are that fixs them and or you can look on line there is company that dose them call speedo tech hope this helps

would change the ECU with the chip from the key from a car in scrapyard ,but before you get carried away try another seperate earth on the back of the speedo printed circuit board ,i wouldnt mind betting this is your problem

check the ground wires.

usually its the negitive terminal you disconnect for about 30 secs. tyr that. if that doesnt do it, its possible you shorted something out.

Found the problem with the speedometer on my Buick. When you use the magnet to fix the gas gauge, will can and may affect your speedo. So use the magnet trick on it as well. Appears that the manufacturer didn't think about the needles being able to swing past the magnet they have set up in the gauges. Should have put a stop pin on the gauges.

you need a new speed sensor,very common fault for it to affect the fuel gauge,,,,,,,,,,,,,,,dont steam clean anything that involves electrics !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!