2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 133Get this manual
CARBURATION AND FUEL SYSTEM 4Locate fuel pumpsending unit connector
FUEL PICK-UPSENDING UNIT REPLACEMENT (CARB
Fuel Pick-upSending Unit Replacement
PFA NUT 70 ftlbs(95 Nm)
5Disconnect the fuel pumpsending unit connection and measure the resistance between the Purple and Brown wires (see chapter 10 for further details)If out of specification, replace the fuel pump
Discard the PFA nut and use new PFA nut upon reinstallation of the fuel sending unit