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Fri 18 Aug, 2017 07:01 pm
I installed a 2 track Lightolier Lytespan track in the LR ceiling in 1985. 4 lights on the track, 2 in each circuit, separately switched on dimmers running off a dedicated 110v line from the fuse box. 33 years of perfect operation. We did nothing but replace an occasional bulb. Yesterday I wanted to slide a working light fixture about 10 inches. When I did, it refused to light. The bulb tested good in another socket; a new bulb failed in the subject one. There's nothing visibly wrong with the problem fixture, and the other light on that circuit works fine. I reinstalled this 6 times. It never lit. I have the original paperwork and it shows a black plastic insert in the base of the light fitting. It's used to determine which electrical circuit controls that light. There is no such spacer here. Now I'm thinking there was a spacer and it's stuck in the track where the fixture was before I moved it. brb ... My test probe (an ice cream stick) shows there's no spacer left behind. Any idea what happened? What might cure it?
Back with problem solved. At my wife's suggestion I re-cleaned the contacts, only better, filing both sides of both contacts thoroughly. That did it. Continuity test didn't reveal a contact problem because I used very tight alligator clips on a new multi-meter.