I have an L 120 w/ 48" deck. While mowing, the blades disengaged and I couldn't get them to engage. Pulled into the garage and grabbed the JD tech manual to trouble shoot. Grabbed my Fluke meter. The switches met the resistance and continuity specs but was missing voltage at one of the pins on the key switch (manual says replace). I replaced both the key and the pto switches. Still NO GO :frown: I hooked the pto directly to the battery and it clunks so I assume it's working. I googled a blowup drawing of the pto to hopefully understand how it worked internally...no luck. Any help/guidance would be appreciated. Thanx. AB