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Cosmetic Modification (Interior/Exterior/Lighting) Discussions about cosmetic mods.


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Old 09-09-2016, 03:52 PM   #1
fizzymike
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Wire Valenti Reverse Light to Stock Tail Lights

Whats up guys.

Im trying to wire my valenti diffuser reverse light to my existing taillights so I could see the brake light. Right now it just plugs into the existing harness showing the reverse light.

Coming of the valenti light is a plug, red wire and a blue wire. My taillights aren't coming in the mail for 2 weeks so I cant tell what colors to splice the red and blue wire into. In the video they wire it to valenti tail lights only. I just want to enable the brake light as well while having the stock tail lights.

Here are 2 images showing what I see in the video vs what I have in real life. Thanks
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Old 09-09-2016, 06:51 PM   #2
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Old 09-09-2016, 08:13 PM   #3
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Well, grasshopper () one wire goes to the positive lead (where the electrons are coming from) the other wire goes to ground.

Sometimes, with lights, it doesn't make any difference.

So, use an amp meter to find the positive lead that is hot when you want the lights to go ON, and hook one wire to it. Hook the other one to something that is grounded.

Oh, just keep trying stuff ...... soon you will see the light .....

Bubba says you can find a hot wire with a test light or scratch the suspect hot wire on something that is grounded ...... and look for the sparks. Bubba also replaces a lot of fuses with his technique ......


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Old 09-09-2016, 09:20 PM   #4
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In a DC system, black is generally a negative (grounded) conductor. That being said automotive wiring harnesses can be whatever the manufacturer decided to do. With a red and blue wire, I would venture to guess the red is + and the blue is -. Many European and Asian power cords use blue as a neutral, or grounded, conductor. Like Hum said, though, to be safe get a cheap multimeter and find the + wire first before you try splicing. LEDs don't generally take kindly to being connected backward. They are diodes (Light Emitting Diode) and definitely have a + and - connection. You can easily damage a LED by reversing polarity of the power connection.
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Old 09-09-2016, 09:39 PM   #5
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In a DC system, black is generally a negative (grounded) conductor. That being said automotive wiring harnesses can be whatever the manufacturer decided to do. With a red and blue wire, I would venture to guess the red is + and the blue is -. Many European and Asian power cords use blue as a neutral, or grounded, conductor. Like Hum said, though, to be safe get a cheap multimeter and find the + wire first before you try splicing. LEDs don't generally take kindly to being connected backward. They are diodes (Light Emitting Diode) and definitely have a + and - connection. You can easily damage a LED by reversing polarity of the power connection.
Well, I'll be darned, I didn't know that....

I don't have any LED lights on my car ....... none that work that is .....

Yep, I'm adding ol @wireman957 to my staff of consultants ......


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Old 09-10-2016, 04:57 PM   #6
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In a DC system, black is generally a negative (grounded) conductor. That being said automotive wiring harnesses can be whatever the manufacturer decided to do. With a red and blue wire, I would venture to guess the red is + and the blue is -. Many European and Asian power cords use blue as a neutral, or grounded, conductor. Like Hum said, though, to be safe get a cheap multimeter and find the + wire first before you try splicing. LEDs don't generally take kindly to being connected backward. They are diodes (Light Emitting Diode) and definitely have a + and - connection. You can easily damage a LED by reversing polarity of the power connection.
Thank you, I didnt wanna just wire it to light up but wire it to the existing tail lights so it only comes on when running lights are on
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