Thread: Weird issue with LED tail light bulbs
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Old Apr 19, 2011 | 11:26 PM
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onehundred80
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From: Ontario
Default Re: Weird issue with LED tail light bulbs
Originally Posted by nox1s
I dont' know if this helps or not or if I just dont really understand the problem... but when one of my brake lights was out I purchased the wrong bulbs, it only had a single filament and the same thing was happening to me.. the 3rd brake light was always on and my brake light wouldn't really get any brighter when I hit the brakes..

The real bulbs are dual filament, the second filament is a lot brighter than the first which is when the brakes are pressed...

With the LEDs, i'm sure they are all the same. They are probably messing up the circuit just like my wrong bulb did.... i'm not sure how you would fix this, since I don't know if they make dual leds??? if that makes sense
I'll take one more stab at this, the picture shown on ebay has two terminals that are for two circuits in the bulb, I'd guess two sides for rear light and four sides for rear and brake lights. Does your bulb have two terminals? I am surprised that a single filament bulb even lit up, as they have a center terminal I thought. A single filament would not get any brighter, as 12 volts is still 12 volts even if the center terminal touched both contacts. For the same reason I cannot see the third brake light getting brighter.
I would suggest putting the correct bulbs in and see what happens, this would show if there is a problem with the circuit and lay the cause of the problem on the LED's if there is no problem.
 
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