Need electrical schematic / wiring diagram or the LM2100SP

The self propelled feature of this mower doesn’t work. The blade motor does run. I checked the wiring for pinches and breaks at the pivot. The MOSFETs both test within range with a diode tester. When I pull the self propelled lever, the LEDs on the battery light up, telling me the circuit is intact. I applied 12 volts to the self propelled motor and it works. As a retired ASE CMAT L1, I rarely used the parts cannon to diagnose. The PCBA and the wiring appear to be common fail points, but both test good on this mower. Any assistance is greatly appreciated.