LEDS lights from Princess Auto - Fiberglass RV


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Old 04-23-2011, 04:13 PM   #1
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LEDS lights from Princess Auto

I got two 1156 LED bulbs and neither work... I was thinking I might have a power issue but I thought I should ask here to see if anyone has run accross the same problem? tried 2 different lights and no luck.
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Old 04-23-2011, 04:21 PM   #2
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Did you flip the wires? The LEDS will only work one way.
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Old 04-23-2011, 04:31 PM   #3
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Quote:
Originally Posted by Greg H View Post
Did you flip the wires? The LEDS will only work one way.

really? I didn't know that!
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Old 04-23-2011, 05:21 PM   #4
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Well that's what I hear.
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Old 04-23-2011, 06:21 PM   #5
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It is true- LED's work with the wires only 1 way. I test mine with a 9volt battery to make sure I know which one is positive.
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Old 04-23-2011, 06:27 PM   #6
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learned something new today.
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Old 04-23-2011, 06:42 PM   #7
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learned something new today.
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You can learn something new everyday.
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Old 04-23-2011, 06:47 PM   #8
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You can learn something new everyday.
Greg......
That's so true..... an old timer (when i was about 17 years old) told me the same as you and i definitely try to learn something new everyday.
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Old 04-23-2011, 06:55 PM   #9
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Not all LED bulbs have to be properly (+ to + and - to -) connected to DC voltage source. Some will work on AC or any DC polarity. Most automotive bulbs with BA15S base, such as 1157 will only work with + connected to the center electrode, most of these light sockets are wired with ground (-) being connected to the metal shroud. For example G4 style bulbs will work on AC or DC G4 Tower LED Lamps Specifications
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Old 04-23-2011, 08:02 PM   #10
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I installed a half dozen wedge-base LEDs in my trailer a few days ago, and it was necessary to trial-and-error them. Half the time I had to pull them back out of the socket and flip them the other way, then they worked fine. Light output seems to be about half or two thirds of the incans, but that's enough. I can always turn an extra LED on and still be using far less current.
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Old 04-23-2011, 09:10 PM   #11
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LED bulb capable of using 12 VAC or being independent to DC polarity has to have built in rectifier such as Wheatstone bridge or equivalent. It is very likely that simple wedge bulb will have direct connection to LED and it will be polarity sensitive. If you see an electronic circuit in the bulb it will likely have a necessary rectifier built in.
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Old 04-24-2011, 10:53 AM   #12
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The ones I bought from superbright must have the electronics to make sure they don't need to be flipped, otherwise the light would have to bounce off the back of the fixture. They worked fine when inserted the proper way.
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Old 04-24-2011, 11:58 AM   #13
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The ones I bought from superbright must have the electronics to make sure they don't need to be flipped, otherwise the light would have to bounce off the back of the fixture. They worked fine when inserted the proper way.
Yes, they have rectifying Wheatstone bridge formed by D1, D2, D3 and D4.
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Old 04-25-2011, 09:11 PM   #14
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so a rectifier means they'll work without reversing the wires on the trailer? I think I'll try to to flip the porch light wire this time and look for the proper bulbs for the interior fixtures
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