Well...after laying under the dash and under the truck almost all day with jumper wires, test light and ohm meter I got frustrated, unplugged the hot side to both sumps and bolted the truck back together, everything works but the gas gauge...if it runs out of gas on one tank I'll just switch to the other . While I had it apart I installed a NOS Sun Super Tach II that I had on the shelf, took the truck into to town to grab something to eat and top off both gas tanks, no rattles, no wind noise...man this thing runs out nice....at 2900 RPM@70 ....on a side note, I found some burnt wires in the driver's side frame rail that could be the fuel gauge issue but I will have to pull the frame tank to further investigate and I'm not doing that until I get my lift installed in a month or so...