Almost a gear up
So I am in the pattern on downwind on a busy day. Traffic called out for me to find on base and final. I put the gear lever down and check for 3 green. All looks well. Get slowed down and start adding flaps while looking for traffic. Turn base, glance down to see 3 green. Base to final, now have full flaps and power back, habit has me glance to see 3 green again. Plane waiting to take off says over frequency “you better get your gear down” I perk up, the gear lever is down, I have the full flaps and low power with no warning lights, I think, is he talking to me. I glance at the gear lights and it looks like 3 green, then I shield the bright sunlight with my hand and realize they are not lit. Tell the tower “I’m going around”. They say OK and contact emergency services. I yank the book out and start troubleshooting to find a tripped circuit breaker. Reset the breaker and all is well, well except for the fire trucks waiting for me. Why on earth would Piper put the gear motor and warning lights on the same circuit breaker? I don’t know if all the Pipers are like this, mine is a 1994 PA-32R-301. If there hadn’t been a plane on the ground that caught this for me I probably would have had a gear up landing.