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Old 10-02-2010, 02:24 AM   #1
tthornt
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Third Brake Light

Hey all - I'm trying to add a third brake light (Mounted on top of the cab) on my 1983 C10. Any suggestions as to how the third light (has two wires) should be wired?

Thanks,
Tony
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Old 10-02-2010, 09:04 AM   #2
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Re: Third Brake Light

astro or tahoe 3rd brake light looks like a good choice for a sway to me
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Old 10-02-2010, 11:22 AM   #3
BLE 'BURBAN
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Re: Third Brake Light

Run the powered wire directly to to your brake light switch. and ground out the other lead. This way it won't flash with your turn signal the way most aftermarket installs do that I've seen.
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Old 10-02-2010, 02:52 PM   #4
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Re: Third Brake Light

The first thing you want to check is your taillights. If yours doesn't have separate brake/turn lamps, then you will have to use a logic circuit. I want to say the 83 does have separate lamps though, so you should be ok. Here is a wiring diagram from another thread for your year model:

http://www.73-87chevytrucks.com/tech...s_rr_light.jpg

I installed an aftermarket third brake light license frame on my 1980 C10 with 3 wires and it was a PITA, but mine does not have separate lamps so I had to use a logic circuit on mine. Here is a diagram of how I created one with two relays. I connected mine to where the third brake light flashes with the turn signals, but like I said if yours has separate bulbs you should be ok. Just figure out which wire is the brake light and connect the power of the third brake light to that and ground the other wire. I hope this helps.
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Old 10-02-2010, 11:42 PM   #5
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Re: Third Brake Light

Quote:
Originally Posted by BLE 'BURBAN View Post
Run the powered wire directly to to your brake light switch. and ground out the other lead. This way it won't flash with your turn signal the way most aftermarket installs do that I've seen.
Thats how I did it.
http://67-72chevytrucks.com/vboard/s...d.php?t=361457
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Old 11-18-2012, 07:06 PM   #6
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Re: Third Brake Light

I just ran another wire from my brake light wire at the brake, took about 15 minutes. Thanks for the how to BLE 'BURBAN.
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Old 11-19-2012, 02:36 AM   #7
BLE 'BURBAN
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Re: Third Brake Light

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Originally Posted by 1964Chevy View Post
I just ran another wire from my brake light wire at the brake, took about 15 minutes. Thanks for the how to BLE 'BURBAN.
Anytime! And welcome to the board!!!
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Old 11-19-2012, 09:52 AM   #8
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Re: Third Brake Light

Quote:
Originally Posted by BLE 'BURBAN View Post
Run the powered wire directly to to your brake light switch. and ground out the other lead. This way it won't flash with your turn signal the way most aftermarket installs do that I've seen.
that is the correct way to do it.
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Old 11-21-2012, 09:55 AM   #9
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Re: Third Brake Light

I installed a ford f150/250 third brake light. It fit really well, and has the brake light with bed lights. I ran a wire from the brake switch to the light. You also have to cut out the mounting hole some..... pics.
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