A single phase reversable motor actually has 2 phases. When you put power on the forward lead, that's phase 1. The capacitor causes a phase delay. The delayed output goes to phase 2 (the reverse lead).
1,2,1,2... = forward.
If you put power on phase 2 (the reverse lead), phase 2 gets power first, then delayed power goes to phase 1. 2,1,2,1... = reverse.
2 windings, a common, and a cap is all that's needed. This only works for fractional horsepower motors, because the cap is powering one of the phases.
A Fluke (in capacitance mode) will read O/L if the cap is shorted. On Ohms, a good cap will read zero ohms for a split second, then rise to infinity as the cap charges. This is actually how the capacitance test works. It estimates capacitance by timing how long it takes the cap to charge. The longer it takes, the more capcitance. If it never starts charging, then the Fluke reports O/L.
A constant reading of .17 means your cap is shorted. Replace it.