My Kubota M5700 has an issue with the fuel gauge. When I short the two prongs on the cable at the sending unit, the gauge goes to full. I replaced the sending unit and it still does not respond. The sending unit on this tractor appears to be a little different. It has to prongs. The sending unit has the float plus a straight rod that has a small cylinder looking thing at the end. Nether one of the terminals appear to have continuity to ground. I’m just wondering if this sending unit tests differently that others? Any suggestions here?