Installed a set of HD heated grips on my '07 Ultra this spring. All was good until this week. They do not heat up at all. I have checked all the connections and fuses and cannot find a problem. I get battery voltage everywhere I check. Pulled the left grip this evening and checked for continuity at the connector going to the right grip. Meter shows 3.5 ohms resistance. A check of the other side of said connector shows battery voltage, but I still don't have warm grips. I am at a loss where to look next.