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reverse polarity in rear brake light

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Old 04-30-2016, 08:06 PM
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Default reverse polarity in rear brake light

I just did a big bore kit, pipes, paint on my 2007 Harley wide glide. (FXDWG) I also put new chrome on handlebar so i had to splice in front running lights/blinkers. I hooked up wiring harness and here's the problem. Everything works except the rear tail lights brightness is reversed. So essentially brake light is running light and running light is brake light. Additionally, the rear brake pedal doesn't activate/work either way. switch may be bad or I bled it incorrectly (it worked before build). I checked all connections and grounds 5 times over. Please help!!!!! this is like my 4th build and I feel foolish not knowing whats going on.
 
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Old 04-30-2016, 08:44 PM
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Did you transpose the red & green tail light wires, perhaps? You can check the stoplight switch with an ohm meter. It should read 0 ohms resistance with the brake pedal depressed.
 
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Old 04-30-2016, 08:48 PM
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I never touched any wires inside the rear connecting wiring harness, just plugged them back in to connections.
 

Last edited by kcinohio; 04-30-2016 at 08:51 PM.
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Old 04-30-2016, 08:51 PM
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What do I set ohms to? Never used 1 before
 
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Old 04-30-2016, 08:53 PM
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Is this an LED tailight?
 
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Old 04-30-2016, 08:54 PM
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Originally Posted by kcinohio
What do I set ohms to? Never used 1 before
200 scale will be fine.
 
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Old 04-30-2016, 09:00 PM
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No stock lights
 
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Old 05-01-2016, 09:20 AM
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When I put LED turn signals on mine I found one side had the wires reversed, from the factory. Just pop the pins out of the connectors and swap them.
 
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Old 05-01-2016, 09:56 AM
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Originally Posted by kcinohio
I also put new chrome on handlebar so i had to splice in front running lights/blinkers.
Not sure what you mean by that, but if you pulled apart the right side handle bar grip,, you may have broken the front brake light switch.
It has a little rubber boot around it, and it's a common error to rip that rubber when re-installing the grip.
If the rubber is torn the front switch will always be on.
You can pull the brake lever and reach in there with a small screwdriver or something and push that switch to test,, push it in for off, let it out for on.
 
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Old 05-01-2016, 10:50 AM
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the rubber is torn. yes, so if i get the rubber it will revert back to normal? what i meant by quoted statement is that I put on chrome covers and chrome handle bar controls. throttle and clutch side
 


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