Well i was driving this past weekend and my fuel filter light came on so i pulled over to the side of the road and shut the truck off. I went to take the fuel filter off to see if there was an air space in the filter. Well as soon as i cracked the filter loose I had fuel pouring out. I tightened the filter back onto the housing. Then i took a gatorade bottle and drained the filter and to my surprise, the filter was full of gunk and maybe a quarter inch of diesel on the top of it all. I walked to the nearest parts store and bought a new filter, and installed it. Started the truck up and the light came back on after two minutes. Had the truck towed home and I drianed the fuel tanks/cleaned and went and bought 15 gallons of clean diesel (Gas Station that I was buying fuel from shut down due to contaminated tanks). But once again the fuel filter light will not turn off. Any ideas? No lack of power. ( Can still roll coal through all gears without any hesitation or sign of lack of fuel).

 

could anyone tell me where the sensor would be that would turn the ffl on?

 

The fuel filter ristriction sensor is located on the filter header, next to the schrader valve.

 

Its a little iddy biddy 1 spade plug.