I have a toro 44'recycler walk behind that will not keep the blade engaged. The fuse is good. The blade control bail switch seems in working order. The blade control rocker switch will engage the blade. When you release the rocker switch the blade stops. I can jump across the relay and the blade will stay engaged, tried a new relay and the same thing happens. There is a solid state module that I am not quite sure what it is and I can't locate a wiring diagram. I am wondering if the engine is putting out the proper voltage but i can't seem to find much info on that either. Any help would appreciated.