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#1 HDWildBill OFFLINE  

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Posted October 07, 2016 - 09:10 AM

I'm usually pretty good at figuring out electrical problems but this one has me stumped.  I decided that the little tail light and small turn signals were not enough on the back of the Dyna (MC) I just got.  I also hard mounted some saddle bags so the turn signals had to be moved.  So I got these LED strips (tail light, brake & turn signals) from Amazon and wired them in.  All works except the when I connect the brake wire the tail lights don't work but the brake light does.  Disconnect the brake wire and the tail light works.  This doesn't effect the tail light it's self it works as it's supposed to.  

 

The turn signals work just fine and either the brake or the tail light work but not both at the same time.  I have read that some times you need to to put a resistor or balance wire in but not sure what needs to be done.  Any help would be appreciated. Thanks



#2 pick-to-stone OFFLINE  

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Posted October 07, 2016 - 09:17 AM

Ok I have work on motorcycles but I've never here'd of that happening but their might be a defect in the lights
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#3 boyscout862 ONLINE  

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Posted October 07, 2016 - 09:18 AM

How's life Bill? It sounds like you are running into a similar problem that I had with my van. It had to do with the van being 6 wire and trailer being 4 wire. I ended up having to buy an adapter module at Walmart for $20 in their trailer section. Take a look at the pieces you removed and plot their schematic and then what the new stuff needs. Comparing them should show the differences that you need to address. Good Luck, Rick


Edited by boyscout862, October 07, 2016 - 09:18 AM.

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#4 HDWildBill OFFLINE  

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Posted October 07, 2016 - 09:54 AM

I would think this would be pretty much straightforward, just plug each light cluster into the respective electrical circuit. 



#5 boyscout862 ONLINE  

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Posted October 07, 2016 - 10:20 AM

I would think this would be pretty much straightforward, just plug each light cluster into the respective electrical circuit. 

Since when is life straight forward? Every time I followed the rules, they'd change the rules. Can't trust much to be easy.


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#6 Alc ONLINE  

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Posted October 07, 2016 - 10:34 AM

I'm not sure if it's the same problem as the ones my son put on his bike but the color code on the new LED  was wrong , the brown wire on the new light went to the brake wire and the red wire went on the tail light wire . He  matched the wire brown -brown red -red but the LED was backwards after switching them from him it worked fine .  .


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#7 chieffan OFFLINE  

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Posted October 07, 2016 - 10:47 AM

Your tail light will be dimmer than the brake and turn light.  Is the LED 3 separate sets of LED'S or just two?  Ran into one LED strip that used lower voltage for the tail light and higher for the brake/turn. Both were the same set of LED's.  Crazy.


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#8 bh115577 OFFLINE  

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Posted October 07, 2016 - 10:50 AM

I've installed some LED lights from Napa that had a black and white wire. Black was hot and white was ground.


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#9 JBRamsey ONLINE  

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Posted October 07, 2016 - 11:43 AM

I've installed some LED lights from Napa that had a black and white wire. Black was hot and white was ground.


Lots of equipment uses white wires for ground in the harnesses. It's because they are are easy to see.
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#10 HDWildBill OFFLINE  

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Posted October 07, 2016 - 01:46 PM

I figured it out.  Yesterday when I was t/s I never disconnected the tail / brake lamp from the braking system I just disconnected the tail light portion.  Reading Alc's post it dawned on me so I went out and disconnected the brake wire to the tail lamp and the LED's work as advertised.  I think all I need to do is put a relay on the main tail lamp brake and all should be good. 

 

I put an one LED bar on each saddle bag so right now I have both bars lighting when I hit the brakes and all 3 (both LED bars and tail lamp) for running lights and then each LED lights depending which way I'm going.  Thanks for everyone's help. 

 

 

Since when is life straight forward? Every time I followed the rules, they'd change the rules. Can't trust much to be easy.

 

That's about the truth of it!  I don't know how many times I thought something would be easy and it turns out to be either and all day or multi day affair.


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#11 Cat385B ONLINE  

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Posted October 07, 2016 - 02:49 PM

And the pics are ......... where, exactly?
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#12 KennyP OFFLINE  

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Posted October 07, 2016 - 03:28 PM

And the pics are ......... where, exactly?

Maybe in the camera? He's waiting for them to be processed? Forgot to take the lens cap off?


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#13 HDWildBill OFFLINE  

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Posted October 07, 2016 - 04:03 PM

And the pics are ......... where, exactly?

 

Maybe in the camera? He's waiting for them to be processed? Forgot to take the lens cap off?

 

You expect me to be able to work a camera???? That has to many moving parts for me. 


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#14 KC9KAS OFFLINE  

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Posted October 07, 2016 - 04:34 PM

Make sure you have good grounds on each LED light.


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#15 MiCarl ONLINE  

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Posted October 07, 2016 - 06:35 PM

I've run into this with cheap LEDs.  Put diodes on the leads so they don't back feed and they should work.


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