Originally Posted by piston slapper
Check the diodes from the engine plug in to the sam module. Start and run circuits.
Posted via Mobile Device
The only diode on the machine seems to be the one combined with a relay and which I have already replaced. The Scag wiring diagram does show a second diode between the negative terminal of the hour meter and an unspecified point on the engine, but the parts list does not show that second diode, and I have not seen one. The Kohler wiring diagram and parts list show no diodes at all.