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No yellow🙄

Ok. How do you test a 8 Ft T12 light bulb with single tab if it’s good or not?

Look at all these comments! You should write some of these people back.

I think you should keep making more videos.

is this magnetic ballast ?

Thanks man..

The other videos I have watched show to use the white wire coming out of the ballast itself, instead of the white coming from the ceiling. Does it matter ..???

When you were hearing the beep, weren’t you essentially using Continuity mode on your multimeter? (continuity measured in ohms as well of course)

Very helpful video and thanks a million.

This is a very good explanation. Thanks

T8 is just he diameter. They measure the diameter's in 1/8's of an inch- So a "T8" is 8/8's of an inch.. or in other words 1" diameter. You can have T8 bulbs in many different lengths.

Thanks for the info. Really appreciated

I bought a brand new Ballast from Homedepot and tested it using this method. The blue wire showed resistance. I used it anyway. It came out good. Is this method reliable?

Exactly what I wanted to know. Thanks for posting this.

Thank you, Sir. So clear and simple instructions.

Thanks for the video. I tested my ballast - all seemed good. But it's definitely bad because I put a new one in and the lights work. Just curious what else can go bad in a ballast?

This is exactly what I needed to know. Thank you for being so helpful! :)

Thank you for this very helpful video. Have a great day.

Thank You Very Much for get straight to the test some people want to be comics, personally i don't have time for comedy 👍👍

Just replaced my ballast that checked good using this method. If all lights go out at the same time; likely the ballast. Power to ballast but not out; bad ballast. I bought lights and ballast; now I have spare bulbs.

I’m not sure as to where the black and white wires in your video are coming from, or going to??? Thank you

So low resistance or continuity means it’s bad. Is that true for electronic not transformer ballasts? My electronic ballast failed to work but passed your test. I replaced it and problem solved. Electronic ballasts are basically switching power supplies that put out the high voltage without using a conventional transformer.

Good. Thanks for the effort to make the video.

Every ballast does NOT have 2 yellow, red, and blue

Thanks for the video. It really helped.

What5 about input side--I would assume an open here would be bad --black vs white ??

I'm only just a little bitty housewife trying to do my best at fixing what I can in our 1904 farmhouse, so it may not mean much at all, but I can't thank you enough for making this video! This is the first time I have been able to find a video that would actually 1. Be something I can physically do myself (I'm rather tiny) 2. Use materials I have in my toolbox/know what they are 3. Explain things is a way that I can actually understand what to do. So thank you, for helping me with something I've been struggling with for months!

The T designates tube, the 8 or 12 designates diameter of the tube, in eighths of an inch. 8 eighths is a 1” tube. 12 eighths is a 1-1/2” tube. T12 are the most common.

I have a T8 4ft 2 bulb fluorescent fixture with an emergency battery in it. The lights were off and I changed the bulb but it never worked. The test switch light is lit bright red. There is food voltage going in and the ballast is good. What might I Check next?

Great job slidertoo. Straightforward and to the point.

Thank you, brother, for making this video with great clarity. I have to tackle two separate tube light fixtures at my daughter's place. Her boyfriend replaced all 4 tube lights, but none work. It's not a circuit breaker, because the carport also has a regular bulb light, and that and the 2 tube lights are controlled by the same switch, and the bulb light works. I do have an ohmeter, and now I know how to test the ballists.

Thank you! I think this is my issue. Two of the 4 led bulbs turns on then after 45 min or so it the 2 turns off and then back on again after sometime.

2:20 - 3:00 THE ACTUAL TEST. (Any reading other than _Outside the _Limit (OL) of the tester range with the probes between the white (neutral) and any of the lamp means that coil and therefore the whole ballast is bad.)

There was an easier way to see if the ballast was good. Change out the bulbs with new bulbs and if it's lights there u go. If not it's the ballast. Although u still have to worry about the holders but not really as those are the last piece to the problem if it continues

Nice! Thank you!

If you're testing a ballast from a plug in(not hardwired) fluorescent fixture, which wire would you connect the black (neg) probe to?

if no measures, the ballast is OK??? Thanks.

VERY NICE THANKS