just saw your pics...I guess I was mistaken. Thats kinda strange that they wouldn't have the entire wire bundle for the harness there.

 

Ya, GM saved 17 cents by using 4 wires and not 7.

 

Thanks for posting the Pics. The Draw-Tite hitch looks nice and clean and high enough. Think I'll do the same. I just don't want to cut the rear bumper to install the OEM hitch. Here in the North East it's just an open invitation for rust no matter how well you think you've sealed the cut edge.

I also noticed that Draw-Tite just introduced a matching front mounted receiver. Seems like a nice combination and a confidence builder if you have a good portable winch stowed in the trunk.

 

I JUST HOOKED UP MY BIKE TRAILER LAST NIGHT WHICH IS WIRED TO CODE. IT HAS A FLAT 4 POLE PLUG. I PULLED IT UP THRU THE SUPPLIED 7-4 WAY PLUG. NOW WHEN I PRESS THE BRAKES, ALL TRAILER LIGHTS GO OUT. IS THE H3 WIED TO CODE OR ANY SUGGESTIONS?
THANKS

 

I installed my own trailor hitch wiring harness. The factory DOES have the four trailor hitch wires loose under the bumper, with shrink tubing around each of the four wires (as you found). If you want a seven-wire hookup, there are adapters that you have to buy, BUT you won't have the functionality of a real heavy-duty braking system unless you buy a third-party brake towing system that applies pressure to the trailor's brakes based on how hard you stop. You probably will never need this on an H3 though because it can't tow all that much weight to really need the system, unless you are maxing out at 4500 lbs. I'm not an expert at it, but I did alot of research a few months ago. I toed a few things and the brakes on the H3 are so good, I couldn't even feel the trailor behind me.

 

THANKS. I JUST NEED THE USE OF THE 4 POLE FLAT PLUG ONLY. I DO HAVE RUNNING LIGHTS WHEN PLUGGED UP. JUST WHEN I HIT THE BRAKES, ALL GOES OUT.

 

Did anyone ever locate the 7 way plug in the harness? According to the T One Connector I bought for 2006 - Current Hummer H3 it's suppose to be there, but from what I'm reading here it doesn;t exist and you have to use the four loose wires in the harness. Just wondering what the manufacturer of this T One Connector was thinking or referencing?

 

If you found this post also see the following post for more info...

https://www.hummerforums.com/m_54033..._/tm.htm#55107