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power to brake light wire but no light


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tarheelrotary
New User

Mar 6, 2014, 5:54 PM

Post #1 of 6 (1372 views)
power to brake light wire but no light Sign In

I have a camp trailer with a 7 pin connector. My driver side brake light won't work. It has continuity and power to it but with the brake lights on it won't work. I have tried new bulb and still nothing. I even rubbed the power wire and ground wire together to see if it made any sparks and nothing. The parking lights work fine. Any help on this question. Thanks.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Mar 6, 2014, 5:59 PM

Post #2 of 6 (1366 views)
Re: power to brake light wire but no light Sign In

You need both power and ground to make the light work so you have to be missing one or the other.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



tarheelrotary
New User

Mar 6, 2014, 6:04 PM

Post #3 of 6 (1363 views)
Re: power to brake light wire but no light Sign In

The bulb is one of those dual filament bulbs that twist in. I even held the ground to the side of the bulb and the touched to bottom of the bulb with the brake wire and nothing. I tested it out with the parking light and both sides worked.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Mar 6, 2014, 6:09 PM

Post #4 of 6 (1356 views)
Re: power to brake light wire but no light Sign In

I'll say it again. You are missing one or the other.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



tarheelrotary
New User

Mar 6, 2014, 6:13 PM

Post #5 of 6 (1354 views)
Re: power to brake light wire but no light Sign In

okay thanks. I will look at it harder


tarheelrotary
New User

Mar 6, 2014, 7:14 PM

Post #6 of 6 (1345 views)
Re: power to brake light wire but no light Sign In


In Reply To
I'll say it again. You are missing one or the other.


So checked my ground on my truck by testing continuity on it and the numbers just bounce around and one of my connectors have corrosion on them. So I think I am going to try and fix my ground and replace the corroded connector. I also ran a jumper wire from the truck to the light and still nothing. So I think it is the ground problem on my truck. Also the parking lights and the brake lights share the same ground that is what stumps me the most.






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