A PTO switch engages and disengages the power take-off (PTO) on a tractor. The switch is usually located on the dash of the tractor. When the switch is in the "engaged" position, the PTO is turned on and power is transferred from the engine to the PTO shaft. When the switch is in the "disengaged" position, the PTO is turned off and power is not transferred from the engine to the PTO shaft.