Multi-meter is very helpful, but troubleshooting known problem areas without the MM is probably OK too! My passenger grip warmers were not working on my "regular" '06 RS Venture, and as it turned out the element was fried where the wiring met the "element" portion (i.e. the heated area on the handgrip). By fried I mean the element was "broken" (electrically) at that point. I soldered an aftermarket element onto the factory wiring (so I could plug'n'play), and the wife is happy again! Good luck...