I have an older 8 ft. 3 tube(single pin) fluorescent fixture with two ballasts,one ballast powers the 2 outside bulbs and the other ballast powers the middle tube. Each ballast has a red and blue wire on one side and a black and white wire on the other, but only the middle tube is working. Could somebody post a diagram on how the fixture should be wired as it looks like someone has changed the wiring.....Thanx.
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