A PA24 pilot reported that a popped landing gear motor circuit breaker was reset successfully. Prior to the next landing the gear did not indicate down and locked although visually they appeared down during an ATC Tower flyby. The landing gear collapsed on landing.

Narrative

As I had left my home base earlier in the day I was experiencing some difficulty with the gear motor fuse popping whenever the gear was retracted or extended. Before leaving the area I contacted Center and then local ATC for a low pass to fly by the tower for a visual inspection of the gear to see if it was in the position determined from the cockpit. Having a colleague in the Tower confirm my suspicions I determined the flight could be made under safe conditions. Upon arriving back in the area I asked again for a low approach to determine the position of the landing gear. The tower was able to see that the gear was down; but could not confirm any locked-in position. Through cycling the gear up and down twice never did I receive a locked position light from the panel. Proceeding with the approach I slowed the airplane as much as possible with gear and flaps down touching down lightly. At that time the gear gave away and the airplane flattened to the runway. Skidding several feet I quickly shutdown the system and exited the airplane. I had approximately 20 gallons of fuel on board and could have kept flying attempting to determine how to correct the locked down problem. From all indications inside the cabin; the correct sound and feel indicated that the gear was down and locked; but not so. There are always more actions/inactions that could result in different outcomes. I will second guess and replay this and other situations for a good long time before resolving and forgiving myself.