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Trouble getting aftermarket taillight working... (Read 86 times)

Joshua8195

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Trouble getting aftermarket taillight working...
04/24/16 at 12:42:14

Having trouble getting my aftermarket taillight working properly.

I have it wired up so that the running light and the LP light are on. But I can't figure out the brake light switches? No matter what wire I connect to what, the brake light won't switch on when I use the brake lever or pedal.

I have the wiring diagram, the white wire with the black stripe is the brake light switch.

The brake light I'm using is one from lowbrow customs and it has 2 wires. 1 for running lights. 1 for brake lights.

How do I wire it?

Thanks!!

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verslagen1 YaBB Moderator ModSquad Offline Where there's a will, I want to be in it. Posts: 28886 L.A. California Gender:	Re: Trouble getting aftermarket taillight working. Reply #1 - 04/24/16 at 12:57:26 do you have a ground wire connected to the lights frame? and a picture would help.
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Joshua8195

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Re: Trouble getting aftermarket taillight working.
Reply #2 - 04/24/16 at 13:23:35

Yes! It was the ground! On the instructions the ground said it was optional but I tried it and it didn't work and then I moved to another part of the project. Tried the ground again and moved some wires around and I got it!

Running light works
LP light works
Switched brake light works

Now just to clean up/shorten some wires, connect them up. And I'll be riding!

Thank you!!

Resolved!

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DesertRat Serious Thumper Offline I love rat bikes! Posts: 1569 Arizona	Re: Trouble getting aftermarket taillight working. Reply #3 - 04/24/16 at 19:10:50 Joshua, more electrical work like this and you will become the forums resident electrical guru ...
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Joshua8195

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Taillight Problem. Again...
Reply #4 - 05/02/16 at 08:09:57

Wired up Lowbrow Customs taillight and finally got it working. Or so I thought.

It worked perfectly for a few minutes and now when I turn on the bike after it has been sitting for a few days the taillights running lights come on as they should. but when i use the brake lever or pedal the whole taillight/running light stops working completely.

Turn bike off, and back on, and taillight doesn't do anything.

I have checked the wiring and there are no problems as far as I can tell.

Any ideas?

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Dave YaBB Moderator ModSquad Offline SuzukiSavage.com Rocks! Posts: 18099 Camp Springs, Kentucky Gender:	Re: Taillight Problem. Again... Reply #5 - 05/02/16 at 08:19:29 It sounds like a problem with the ground to me. If the LowBrow light only had 2 wires - you would need to connect a ground wire to the mounting bolts to complete the light installation properly.
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Joshua8195 YaBB Newbies Offline 2004 Bobber Build Posts: 24 Central Florida Gender:	Re: Taillight Problem. Again... Reply #6 - 05/02/16 at 08:23:28 yeah that was the problem at first, there were no instructions and i didn't know it needed to be grounded. I grounded it and it worked great. Then all this happened. Do i need a better ground???
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Dave

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Re: Taillight Problem. Again...
Reply #7 - 05/02/16 at 08:33:33

You are really the only one that can troubleshoot what is happening. Do you have a volt meter or test light?

You need to have power going to the light in the 2 supply wires (1 running light and 1 brake light), and a good ground to complete the circuit.

Try running a jumper wire from the negative terminal of the battery (or the ground wire connection down on the right side of the engine case near the oil sight window) - and connect the jumper wire to the mounting bolt on the tail light.

Someday I will be old......But not today!

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Joshua8195 YaBB Newbies Offline 2004 Bobber Build Posts: 24 Central Florida Gender:	Re: Trouble getting aftermarket taillight working. Reply #8 - 05/02/16 at 08:41:21 yeah I've got a voltmeter. There is power going where it needs to. Im gonna check out the ground now
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Johnny57 Junior Member Offline SuzukiSavage.com Rocks! Posts: 76 Minneapolis Gender:	Re: Trouble getting aftermarket taillight working. Reply #9 - 05/02/16 at 09:27:54 Run a third wire from back of light. This is your ground and attach it to the black/white of the bike. Now the red and the black of the lowbrow light go to the brown and the white/black of the bike. Or viceversa if you wish. They correspond to the filaments and you do need to have a dual filament bulb.
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Joshua8195 YaBB Newbies Offline 2004 Bobber Build Posts: 24 Central Florida Gender:	Re: Trouble getting aftermarket taillight working. Reply #10 - 05/02/16 at 10:47:22 Got it! Tested it. Still working. It was the ground. Test rode it, and works perfectly. Thanks everybody!
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