The engine of her five-year old lawn tractor runs fine, but the mower won't engage. Why? Gary Oshel is a product support representative with John Deere.
I have a John Deere L120 lawn tractor. The PTO won't engage the mower deck. I replaced the switch (actually a knob) with a new one from John Deere.
Most John Deere lawn mowers are equipped with an electric PTO (Power. When the lawn mower is running and the switch on the dashboard is engaged to the "on". one of the wire harness connector metal tabs (it doesn't matter which tab).