I have had the same issue. Chances are from all the motion and the like the wiring has begun to degrade and is shorted. Most of the time this come from the bends and curves of the wiring going from the ballast to the ignitor. I'm not sure where you can a new get replacement wire harness from the ballast to the ignitor without spending coin for both parts, but I'd think that you could simply rewire it yourself. Maybe someone else will chime in with a better answer.