A little over two months ago I installed a combination speedometer/tachometer, a Harley-Davidson plug and play with the mileage set at the factory. It worked perfectly until yesterday. Riding home from work I noticed the tach wasn't working, the speedo worked fine. When the ignition is shut off and turned back on the needles flicker for a second, as they have always done, and settle back to zero. Cranking the bike as usual and the speedometer does its thing but the tach remains motionless at zero. This morning I cranked it and the tach worked for an instant then settled back to zero. Recranking made no difference, no motion at all from the tach needle. This afternoon I'll check the connections but beyond that I'm at a loss as to what to do other than take to the dealer and let them have a go at it. Is there anything I can check or do before making the $ stop at the dealer? Thanking you in advance for any advice or comments. Ishmael 2000 Fatboy, 4700 miles, stage 1, otherwise stock. PS I wonder if there is any warrenty on parts like the speedo/tach. My usual luck says no and the unit is only two months old.