yours works when you push the override only when in reverse? or when in any gear?I just bought an 01 Sportsman 500 that the speedo doesn't work on and ironically the 4WD doesn't work either. I didn't realize that the speedo not working would prevent the the 4WD from working. Today I found that if I push the reverse override button the 4WD will engage. I don't know if this helps you or not, but maybe your hard wire theory has to take place in the override button.