I have a "Lights of America" Florescent fixture (4 ft - 2 bulb shop light).
Only one bulb would light. New bulbs did not fix it. Only one side of the fixture worked. (Always the same side).
I finally tore it apart.
I have repaired and replaced ballasts in a lot of fixtures, but this one is unique. Instead of having one ballast for the entire fixture, this one has thick plastic ends, with one ballast on each end. These ballasts look more like a small transformer or a choke used in power supplies on electronics. Across the wires on each ballast is a capacitor and a resistor. The choke on one end looked ok and that fed the bulb which worked. As soon as I opened the other end, I found the problem. That capacitor literally had a hole in it, and there was black burnt markings around it.
The good capacitor is not labeled like a normal cap, so I dont know what value it is. It says K 505J 250. (I am guessing its 250 volt, but I am clueless about the uf value).
Either way, I am sure that finding a capacitor that will work, would only be a guess...
But I am posting this for another reason. The wires that cross over to the defective side, are joined in the middle of the fixture with a sealed plastic box, which can not be opened. I put my VOM across those wires and there is no reading (on the ohm setting). Is that a fuse, or what? Like I said, I have never seen this type of setup. Every fixture I have ever opened just had straight thru wires, or used wirenuts to join splices.
I can only guess that when the cap shorted, it blew the fuses or whatever is in that thing...
Have any of you ever seen this type of setup?
I'm only asking this because I am curious. I do not intend to buy a new ballast, which would probably cost as much or more than a new fixture. However I may convert this fixture to 4 ft LED replacement bulbs, which means removing all ballasts and directly wiring the sockets to the AC line (only one one end of the bulbs). I was kind of thinking of converting the fixture to LED anyhow, so now I have more reason to do so.