Thanks. It is a Philips Advance Centium - ICN-2P32-N Instant Start Electronic Ballast.
The wiring diagram is on the front of the ballast. It is wired correctly. The fixture is properly grounded. The lamp connections look clean and free from corrosion. I've tried two different, brand new lamps and still have the same issue.
Ok I swapped the blue wires but it did not fix the problem. So just for kicks I took the lamp that wouldn't light out and swapped it with the lamp that did light. Now the lamp that would light on one side lights on the other, and the lamp that didn't light on the one side still doesn't light on the other side. Could it be that I got two bad lamps in a row?
Ok, this is getting weirder. Hold on to your seat.
We went and got 2 new lamps and put them in. Same problem, one would light and one wouldn't.
So I did this: I stuck one end of the lamp we knew would light into one of the blue wire side socket, and it partially lit. When I placed the other end in the corresponding red wire socket it fully lit, like it should.
I then removed the lamp and did the same thing on the other side of the fixture and had the same result. I tried this with all 4 lamps and had the same result.
But when I placed two lamps that I know work into the fixture one of them lights and the other doesn't. I'd be pulling my hair out if I had any left.
Yes. It works on both sets of sockets alone. Whichever lamp I plug in first works on either sockets. But the lamp I plug in second never works.
And when I say "works" I mean it lights along the whole length of the lamp. But it doesn't look like it is at full brightness.
I'm sorry this is taking so long. I'm not an electrician so I figured it would be a simple answer at first, just something I overlooked.
I'm getting 114.4 volts when I check the incoming white to black wires.
Yes our fixtures are 14 years old T12 fixtures. The ballast I replaced was a MagneTek Slimline Ballast 806-SLH-TC-P.
It had one red wire going to one socket & a blue wire going to the other socket on the same end of the fixture.
On the other end it had a white wire from the ballast going to one socket along with the white wire from the line in. This white wire side was on the same lamp as the red wire on the opposite end.
The other socket on this end had the black wire from the ballast as well as the black wire from the line in wired to it. It was on the same lamp as the blue wire from the opposite end.
Ok I fixed it. The problem was I asked the store for a T8 ballast to replace a T12 ballast for an 8 foot light fixture, and they gave me a T8 ballast to replace a T12 ballast for a 4 foot light fixture. The lesson here is just because you don't know what you're doing doesn't mean you can trust people that should know what they're doing. Anyways, once I put the correct ballast on everything else worked as it should. The sockets are the same ones that have been on there forever.