We keep blowing fuses on the lines that powers the moisture meter auger on our lexion. They were originally 5amp, somone told us to go to 7.5amp and we're still blowing those. It isn't an instant break like it'd be for a hard short somewhere; it'll last 5 to 50 acres before popping. We figured the motor was going bad so we replaced it, but are still blowing fuses with the new one. Any ideas?