Im pretty sure that I have a bad thermistor on the fuel level sender. (It has an infinite amount of resistance in air) I was wondering if anyone has a part number or information on where I could just get this part by itself or equivelent. The sender is working perfectly fine and i think that the dealer will replace the whole unit and charge an arm and a leg if i take it to them. thank you

By the way, this is for a 1999 honda civic dx

thanks

 

What do you mean 'thermistor'? As far as I know the sender is a float-driven-rheostat & also has a contact-closure for the warning light. I've never seen individual parts available.

 

The thermistor is part of the low fuel warning light circut. It is attached near the end of the fuel level sender support arm about maybe about an inch off the bottom of the tank when installed. It is the small metal cylinder that is connected with the yellow wire. When it is sumerged in fuel, it is supposed to have a very high resistance therefore the low fuel warning light will not light. However, when the fuel level drops and the thermistor is in the air, the resistance drops and allows current to flow and light the low fuel warning light.

On the 1999 honda civic DX, the fuel gauge is operated by the float driven rheostat, but for the warning light, there is a thermistor and not a contact-closure. On other cars, there might be a contact closure but im not sure. hope this helps anyone!!

Thank you