My Drain water seperator light came on so i drained it. I got in my truck to go somewhere and it came on again so I drained it again. It kept doing that so I changed all my fuel filter's and cleaned the seperator out and it is still coming on :bang. It has been doing this for some time now and I thought maybe it was a bad tank of fuel and would work its way out. I'm starting to think that maybe it's a bad sensor now. Any idea on where the sensor is located and how hard it is to change?? I'm going to try that and see if that works.