Tail light not working/ ground issue - Yamaha Raptor Forum
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post #1 of 10 (permalink) Old 05-15-2017, 09:50 PM Thread Starter
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Tail light not working/ ground issue

Went riding this weekend and went through some semi deep water in my 2001 raptor 660. Anyways my tail light was working great until I went through the water. Got to looking at it and I'm not getting a good ground. I have an led tail light wired. Question is anyone know where this could be grounded? My headlights work by the way. Want to fix it the right way instead of just grounding the light somewhere else.


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post #2 of 10 (permalink) Old 05-16-2017, 12:15 AM
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Water most likely got on the grounding cable and the thing oxidised. You will have to find the grounding cable and clean the contact with sanding paper. That is if the ground is really the problem. You can confirm this by bypassing the grounding cable and attaching it somwere else. if the light starts to work the ground is the problem if not the some other cable is causing the issue. It is good to repair this so your alternator doesn't die if you are getting +12V on the frame (ground).

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post #3 of 10 (permalink) Old 05-16-2017, 12:20 AM
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The black wire from the light's connector is ground.

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post #4 of 10 (permalink) Old 05-16-2017, 09:40 AM Thread Starter
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Water most likely got on the grounding cable and the thing oxidised. You will have to find the grounding cable and clean the contact with sanding paper. That is if the ground is really the problem. You can confirm this by bypassing the grounding cable and attaching it somwere else. if the light starts to work the ground is the problem if not the some other cable is causing the issue. It is good to repair this so your alternator doesn't die if you are getting +12V on the frame (ground).


Ya I did some testing with a test light and I know for sure I'm not grounded but my question is where that wire goes and is grounded at??


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post #5 of 10 (permalink) Old 05-16-2017, 09:56 PM Thread Starter
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Anybody?


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post #6 of 10 (permalink) Old 05-17-2017, 12:23 AM
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Idk. Mine is 2016 and had no issues with it. Get to the tail light and then follow the wire back. As quadmaniac said the black wire is negative or ground in this case. Use a multimeter and you should figure it out pretty fast.

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post #7 of 10 (permalink) Old 05-19-2017, 06:45 AM
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As Quad said, the black wire coming from the connection block is the ground, that then feeds back into the main harness to one of the main grounds. It's been a while since I fitted my wiring harness, but if I remember correctly there should be a ground on the crankcase somewhere, and one by the ignition coil. You could check those and see if they are making connection. Or just run a new ground to the light.


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post #8 of 10 (permalink) Old 05-19-2017, 02:11 PM Thread Starter
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As Quad said, the black wire coming from the connection block is the ground, that then feeds back into the main harness to one of the main grounds. It's been a while since I fitted my wiring harness, but if I remember correctly there should be a ground on the crankcase somewhere, and one by the ignition coil. You could check those and see if they are making connection. Or just run a new ground to the light.


Pretty sure it was was the ground that's on the left side by the shifter. It was full of dirt and still wet after sitting a week under the electric tape. Cleaned it put it back on and have a tail light again. Thanks for the input guys



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post #9 of 10 (permalink) Old 05-22-2017, 08:02 AM
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That's the one


:: 2003 Raptor 660 ::

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post #10 of 10 (permalink) Old 05-22-2017, 08:27 AM
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Thank you for posting the solution. That's a huge help for others researching these threads.


Glad you got it figured out!
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