the sending unit may be stuck
no
i have a 1990 ford ranger and my fule gauge always reads full, why?
The floater inside your pump is sticking. You will have to replace your fuel pump in order to fix this problem.
Why does all the gauge lights come on while driving a 1998 S-10 pick-up.Seems to lose power. Go out and security light stays on.
Your check gauge light comes on if : your coolant temperature guage shows the temperature is high your oil pressure gauge shows the oil pressure is low or your fuel gauge shows the fuel tank is near empty
There is a problem with the Anti-lock Brake System if the warning light stays on ( as long as the red BRAKE light in your gauge cluster is not on , you still have " normal " brakes )
If your ABS light stays on you have a problem with the ABS and it is not functioning. Until the problem is fixed the light will remain on.
If the light stays on it indicates your charging system has malfunctioned. Usually this means the alternator has failed, but not always.
On a 1999 Ford Expedition : If you mean the " CK SUSP " light ( located on the right side of your gauge cluster ) ( if the light stays on then a problem has been detected with the AIR SUSPENSION )
no. speed of light is always constant . as long as the light stays in the same medium. the speed is generally slightly different in different media.
A temperature gauge, that always read the maximum temperature, is usually not connected to the temperature sensor. The wire between the gauge and the sensor must be broken.
Thermostat is sticking.