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Old 11-16-2010, 03:03 PM   #1
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hey there so i havea light that i can't figur out... i have one black and one white that are going to light box, and then two other blacks adn two other whites. so three white and three black. now when i took out the other light that was in before it only used the black wires for power and neutral. i tried this and it didn't work. so i finally got it to work and now the switch seems to do nothing. what should i do??

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Old 11-17-2010, 10:51 AM   #2
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Try this. How to properly troubleshoot this problem?

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Old 11-17-2010, 04:11 PM   #3
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is the white wire from the swith the other "hot" wire in the box? also i have found that for other outlets that occur after this light to work 2 black and 2 white have to be together.. does this change anything

Last edited by tkellett; 11-17-2010 at 04:58 PM.
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Old 11-18-2010, 06:52 AM   #4
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1. Label the grouping or cable that the power wire is in as "power".

2. Using a voltmeter verify that there is no voltage between the loose wires at the right, also no voltage between either of them and ground.

3. Using an ohmmeter or continuity meter (or the ohms function of a multimeter) see if you get continuity (almost 0 ohms) between the two wires at right with the switch in one position and no continuity (almost infinite ohms) with the switch in the other position. If so label that group as "switch".

4. If step 3 did not behave as described, disconnect the wires at left and repeat steps 2 and 3 except using the lower left wires (not the power wire).

5. Connect the white wire from the group labeled "switch" to the black wires of the other two groups, including "power". (Wrap a band of red or black tape on the end of that white wire.)

6. Connect the other white wires to the white wire of your light fixture.

7. Connect the black wire of the group labeled "switch" to your light fixture.
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Last edited by AllanJ; 11-18-2010 at 07:00 AM.
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Old 11-18-2010, 01:42 PM   #5
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By "Connect the white wire from the group labeled "switch" to the black wires of the other two groups, including "power". (Wrap a band of red or black tape on the end of that white wire.)"

do you mean connect the white wire from swith to black power?


so i tried this i have my white switch wire connected to the 2 blacks (one of which is power), i have the group of white wires(one of which is power) connected to the white on the fixture, and the lon black switch wire connected to the fixture...

Last edited by tkellett; 11-18-2010 at 02:00 PM.
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Old 11-18-2010, 09:12 PM   #6
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Quote:
Originally Posted by tkellett View Post
do you mean connect the white wire from swith to black power?
Yes. With exactly two wires coming up from the switch, one of them is connected to the black wire of the light fixture and that one may not be white.

Does it work?
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Old 11-18-2010, 10:36 PM   #7
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so i tried that with the black from the switch, the one i assumed, and it didn't work so i also tried the white from the switch still nothing..
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Old 11-19-2010, 07:09 AM   #8
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Always turn the power off before using an ohmmeter or doing continuity checks.

Have you verified that the switch works by getting continuity between the two wires that came up from the switch depending on the switch position?

Or maybe the light fixture itself is defective.
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Old 11-19-2010, 07:50 AM   #9
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Attached is a diagram that reflects how I believe this should be wired. Barring a device (switch, wire) failure, I expect this to work. Hopefully, this is consistent with the suggestions from the others.
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File Type: pdf Light.pdf (76.4 KB, 42 views)

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