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third brake light


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anderson2624 
Member - Posts: 4
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Joined: November 19, 2011
Location: California, United States
Posted: November 25, 2011 at 8:46 PM / IP Logged  
Can someone point me to a place here where I can get info on installing my "owned " light as a third brake light on an older car? (not a JC Whitney after market)
thanks
gene
i am an idiot 
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Joined: September 21, 2006
Location: Louisiana, United States
Posted: November 26, 2011 at 3:46 AM / IP Logged  

Do the brake lights on your older car do double duty as the turn signals?

jseibold 
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Joined: December 14, 2008
Location: Illinois, United States
Posted: November 26, 2011 at 12:30 PM / IP Logged  

Your existing tail light's brake wire circuit probably does double duty as turn signals.  To make your light work properly, you will likely have to tap the cold side of the brake switch near the brake pedal and then run a wire from there to your 3rd brake light.  It would help if we knew what kind of car (year, make, model) you are installing into?

anderson2624 
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Joined: November 19, 2011
Location: California, United States
Posted: November 26, 2011 at 1:17 PM / IP Logged  
I should know better... 62 Ford Falcon. I was hoping to not have to run a wire from the cold side of the brake as suggested. Turn and stop lights do double duty. Wanted to hook something up at the rear deck.
thanks again this site is awesome
gene
i am an idiot 
Platinum - Posts: 13,667
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Joined: September 21, 2006
Location: Louisiana, United States
Posted: November 26, 2011 at 1:28 PM / IP Logged  
It can be done at the back deck, but you will still need to run a power wire to the front of the car. It will be much more complicated, requiring diodes and relays. So since you will have to run a wire to the front, just run it to the cold side of the brake switch.

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