I need a relay or something


Junior Member
Sep 15, 2016
Montreal, QC
Hi everyone!

I have a bike rack on my 2011 Ford Taurus that I want to install a light that activates when I step on the brakes. Due to the way Ford setup the lights on the Taurus, I can't just tap into the brake lights in the rear. I did manage to tap into the brake light that is in the back window, but due to voltage drop, I'm only getting 6v at the end of the wire. Since I already have a 12v hot wire running to my trailer wiring, what I would like to do is have the wire that comes from the rear window brake light run to some kind of relay or switch to the 12v hot and then from the 12v hot to the bike rack.

Does anyone have any suggestions?





Lock up your daughters!
May 11, 2014
Ames, Iowa
x3 for relay.

However, you should run new wire off the point where your fuse for the brake lights is. 6v is bad drop.


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