Topper center high mounted brake light - Chevy and GMC Duramax Diesel Forum
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Old 05-17-2011, 01:49 PM   eBay Motors  #1 (permalink)
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Topper center high mounted brake light

Does anyone know which wire to tap into for the brake light on the center of the topper? I tapped the yellow wire, but it flashes with the left turn as well as the brake light. I really don't want to run a wire from the back of the cab light.
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Old 05-17-2011, 02:21 PM   eBay Motors  #2 (permalink)
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Not sure if it changed on the LML, but at the rear trailer harness/spare area you'll find a small blue unused wire wrapped up...that's for the aux cap brakelight.
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Old 05-17-2011, 06:40 PM   eBay Motors  #3 (permalink)
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I tried to find it. Not having any luck so far. Everything is taped up and covered in plastic hose type covering. Can any LML owners confirm the blue wire is still there. Please post a picture if possible.
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2011 GMC Denali 2500HD, black on black traded!!!
2012 GMC DENALI 3500HD, black/black, nav radio, sunroof, backup camera, short box srw,traded!!!
2013 GMC Denali 3500HD, black, srw, nav, sunroof, power sliding rear widow, high idle, rear camera, b&w
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Old 05-17-2011, 07:49 PM   eBay Motors  #4 (permalink)
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Start at the trailer plug harness and work back.
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2007 LBZ 3500 LT3 DRW Crew Cab, Sulastics, Putnam XDR 15K, B&W 30K-Turnover GN+Companion, Ride-Rite Air...EFI'd by Rob
2008 LMM 3500WT DRW Crew Cab, 8 'Flat/GN, Workforce Alum Toolbox, Ride-Rite Air, Sulastics
Use-ta Haves 2006-6.0 3500 WT DRW ExCab Flatbed, 2005-LLY 3500 LS DRW Crew Cab, 2002-LB7 3500 LS DRW Crew Cab
I Live my life in such a way that when my feet hit the floor in the morning...Satan shudders & says "Oh shit, he's awake!"

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Old 05-20-2011, 07:25 PM   eBay Motors  #5 (permalink)
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Called my dealer, after waiting 15 minutes on hold, while he searches where ever they look things like this up. He can't find a wire to hook to. Anyone got any suggestions.
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2012 GMC DENALI 3500HD, black/black, nav radio, sunroof, backup camera, short box srw,traded!!!
2013 GMC Denali 3500HD, black, srw, nav, sunroof, power sliding rear widow, high idle, rear camera, b&w
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