I have an intermittent open somewhere in my wiring harness. Sometimes I've got power to the start switch & other times it's gone. I can leave it alone overnight & it starts & runs fine the next day. Does anyone know where I can find a downloadable wiring diagram for my tractor? It's a 1210 Hydro made around '88. I'm about ready to tear it all out & start from scratch but I'd rather try the drawing first.