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1999 - 2006 (GMT800) Section for all discussion related to the 1999-2006 Chevrolet and GMC trucks.

wiring tale lights question

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Old July 23rd, 2017, 9:06 AM
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Default wiring tale lights question

I have a 03 GMC 1500HD. I am putting a flatbed on it. NOT using LED lights.
My problem is on the pickup their is a wire for brake and a wire for stop/turn. My lights on my flat bed hand one wire for brake and stop/turn.
So I wired the 2 wires on the pick up together. Well I am getting some back feeding. When I push on the brake the turn light in the mirror lights up and when I turn the blinker on all the lights blink. Even the brake like on the cab.

So is their some thing than will prevent the pack feeding? Wire in a diode?
Old July 23rd, 2017, 1:50 PM
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I would separate the wires you wired together and add a small light to each side of the flat bed and leave as it was intended to be on the truck.




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