New ballast has 6 wires - replacing old ballast which had 7 wires - how?


Old 05-06-11, 10:05 PM
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New ballast has 6 wires - replacing old ballast which had 7 wires - how?

removed an old ballast from a fluorescent fixture - the old one has 3 ports - on one end is the port that has the black and white wires (the power). The other end of the ballast has 2 ports - one has 2 blue wires and a red wire coming out and the other port has 2 blue wires - a red and a yellow wire. 7 wires in total. There were 2 blues connected to one end of a bulb - 2 blue wires connected to the second bulb. The red and yellow wires went to the other end of bulb 1 - then a jumper wire to the other bulb and finally a red returning to the ballast.

Bought a replacement ballast that has 3 ports - one end has the black and white - no problem with that one. The other end has 2 ports but with only 6 wires. One port has 2 yellow wires and a blue coming out -the other port has 2 red and a blue coming out.

Any idea how to hook up this new ballast? How do I splice the new wires in??

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Old 05-07-11, 07:17 AM
Tolyn Ironhand's Avatar
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The new ballast will have a diagram on the label on how it is to be wired up. You may have to do a little rewiring of the fixture. IF you can post a picture on photobucket and link it here of the fixture and the ballast label.

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