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04-21-2010, 04:03 PM
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Hummer Expert
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Join Date: Feb 2009
Location: Nashville, TN
Posts: 887
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Brake lights no worky
So I bought a trailer yesterday and bought the 7-4 adapter for the trailer lights and noticed that my brake lights weren't coming on 
All the lights work great, turn signals work fine trailer and all, but not the brake lights, I can actually Hear a clicking sound underneath the shifter or "cup holders" when I hit the brakes... like a funny... "CLICK!" and the brakes dont come on...
Has this happended to anyone????
Doesn't sound like a fuse... I dunno.
Thanks in advance.
__________________
2003 Black H2:
Blacked out,7" lift,40" Pitbull Rockers, 20x12 Fuel Octanes and lots of more junk, DemonGuard Brushguard 
2006 Blue H2:
20x12 black Rockstars & 35"s. missed.
2005 Black Mustang Roush Stage 1 #05-1058:
Showcar, Procharged 580HP, 20" Gianelle's, Prokit, 1/8 in 7.56secs.
2009 Silver Cadillac CTS Premium
White interior, lots of future mods.
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04-21-2010, 04:33 PM
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Hummer Expert
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Join Date: Sep 2007
Location: Mason, OH
Posts: 779
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Re: Brake lights no worky
call me....
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04-21-2010, 05:39 PM
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Hummer Expert
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Join Date: Feb 2009
Location: Nashville, TN
Posts: 887
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Re: Brake lights no worky
FYI... The Brake lights dont work on the Hummer, forget the trailer..... The Hummer brakelights are not coming on...
Thanks for helping out Eric.
I'm going to check the wiring on the trailer but now even with the trailer unplugged the brake lights dont work on the truck at all.
Thanks!
__________________
2003 Black H2:
Blacked out,7" lift,40" Pitbull Rockers, 20x12 Fuel Octanes and lots of more junk, DemonGuard Brushguard
2006 Blue H2:
20x12 black Rockstars & 35"s. missed.
2005 Black Mustang Roush Stage 1 #05-1058:
Showcar, Procharged 580HP, 20" Gianelle's, Prokit, 1/8 in 7.56secs.
2009 Silver Cadillac CTS Premium
White interior, lots of future mods.
Last edited by ROUSHDEMON : 04-21-2010 at 08:06 PM.
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05-03-2010, 10:15 PM
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Hummer Professional
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Join Date: Aug 2005
Location: Dallas, Texas
Posts: 314
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Re: Brake lights no worky
I have the same exact problem. Does anybody know the fix for this because I can't even drive my truck.. Thanks in advance.
__________________
Pimpin 8 E Z but somebodys gotta do it .
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05-04-2010, 03:14 AM
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Hummer Professional
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Join Date: May 2005
Location: Indio, California
Posts: 465
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Re: Brake lights no worky
may be a blown fuse
__________________
2003 Hummer H2 LUX...sold
2006 Hummer H2 SUT LUX...sold
2018 Polaris GEM e4
2022 Can-Am Maverick X3 XRS Turbo RR
2024 Rivian R1S Adventure
2024 GMC Sierra AT4X HD
2024 GMC Hummer EV 2X SUV
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05-04-2010, 05:58 AM
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Hummer Professional
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Join Date: Aug 2005
Location: Dallas, Texas
Posts: 314
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Re: Brake lights no worky
I checked both fuses, in the cab and under the hood. Both were good and now I'm lost. I'm trying to see if RoushDemon figured it out because he has or had the same problem. Thanks tho CBR.
__________________
Pimpin 8 E Z but somebodys gotta do it .
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05-05-2010, 04:32 AM
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Hummer Professional
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Join Date: Jul 2009
Location: Franklin, TN
Posts: 380
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Re: Brake lights no worky
try your relays in your fuse box. that was my problem.
__________________
06' black H2 SUV. Truxxx Leveled. 17" XD Addicts. 37" SS M16's. Gobi. DEMONguard. Magnaflow. way to many other things to list...
73' Dodge Charger. 400 Magnum. B5 Blue. White Leather.
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05-08-2010, 05:09 PM
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Hummer Professional
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Join Date: Aug 2005
Location: Dallas, Texas
Posts: 314
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Re: Brake lights no worky
I found my culprit and it was a broken wire from my aftermarket alarm that was soldered to the brake lamp switch under the dash. I think had it not have been a broken solder it would have definitely been the brake lamp switch. Thanks guys for all the help.
__________________
Pimpin 8 E Z but somebodys gotta do it .
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