newell
Junior Member
Posts: 71
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Post by newell on Mar 19, 2010 8:42:55 GMT -5
I mounted an LED brake light (79 Special) that I got off of Flea-Bay and it lights up, but when I push the brake pedal the light doesn't get any brighter. the light has 3 wires, a red yellow and black, I connected the red to the blue, yellow to yellow and black to black... any ideas are greatly appreciated...
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Post by grepper on Mar 19, 2010 9:20:12 GMT -5
I had the same issue.. What's going on is that you've hooked it up so that the light that is intended to be the bright brake light is hooked up to the tail light function. Switch your red and yellow wires. Black should be ground. If you have an electrical tester, you can figure out what wire on your bike is the brake and what is the tail light.
Then take your after market tail light. Touch the black to neg battery terminal, and see how the light functions when you touch the other wires to your positive terminal on your battery, one at a time and together. You'll see what's goign on.
I found that LED lights don't function like conventional bulbs. Not like 1 +1 = 2 (Where the filaments are essentially equal, turning two on makes it brighter), more like there's 1 and 2, and 1+2=2, if you get my drift.
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Post by dingjuled on May 18, 2012 20:59:23 GMT -5
what socket does your car use as brake light  I mounted an LED brake light (79 Special) that I got off of Flea-Bay and it lights up, but when I push the brake pedal the light doesn't get any brighter. the light has 3 wires, a red yellow and black, I connected the red to the blue, yellow to yellow and black to black... any ideas are greatly appreciated... |
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Post by xsleo on May 22, 2012 9:27:37 GMT -5
On an LED brake/tail light the led's get full current when the brake light is lit. To light as a tail light the power is sent through a resistor to limit the current so it lights up at a much less brightness.
A conventional 1157 bulb has two seperate elements. The tail light element is an 8 watt, the brake light is a 27 watt. So when the tail light is lit you get 8 watts of light, step on the brake you add 27 watts of light.
On testing you LED tail/brake, Grepper has the idea. Hook it to the battery. Test each wire combo. One lights the light dim, the other bright. The dim is tail light, this hooks to the blue wire. The bright is the brake and hooks to the yellow wire.
Leo
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