BEN - Two yrs ago I was doing My fall yardwork, pulling the lawn vac, from about 1-2 PM till 2 AM....normally I stop sooner but there was no dew that night so I kep going. While I was unhooking the trailer to put the vac & tractor in the shop the headlights stopped working. Combination of vibration and too high an amp draw and a 25 yr old switch and it totally burned the contacts out of the switch and almost set in, and the battery & whole tractor on fire. I ALWAYS pull the ground cable off ALL the Gubbies & Farmall's now.