When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Hummer H3For the Hummer driver who wants the rugged look and off road capabilities of the Hummer, but in a smaller size and with a more fuel economy friendly engine.
I’m not sure what the red wire gos to but it looks over heated.
The green wire in the back seems to be a ground. no idea wtf it gos too.
I reached out to another electrical shop who said then can do a trace on the circuits the first of the month.
I did learn that the BCM circuitry for the hazard lights in the front and the back, etc. are all on completely separate circuits some go through the fuse box while others go through the BCM
i am learning a lot about automotive electronics.
thanks again to everyone trying to help.
what a frustrating adventure this is.
Did you look at the wiring diagram posted above? Dark Green> Right Rear Brake Light Turn Signal
The dark green wire also goes to the trailer wiring.
Originally Posted by hummerz
Heavy-Duty Trailer Wiring Package
The trailer towing harness contains the following
seven trailer circuits:
• Yellow: Left Stop/Turn Signal
• Dark Green: Right Stop/Turn Signal
• Brown: Taillamps
• White: Ground
• Light Green: Back-up Lamps
• Red: Battery Feed
• Dark Blue: Trailer Brake
Light-Duty Trailer Wiring Package
If your vehicle is not equipped with a trailer
towing package, the chassis harness will
contain the following blunt cut circuits:
• Yellow: Left Stop/Turn Signal
• Dark Green: Right Stop/Turn Signal
• White: Ground
• Brown: Tail Lamps
Yeah im trying to figure out what all that mess is.
I’ll recheck the trailer connection as well.
gonna get back on it tomorrow.
ill update if anything changes.
i was wondering if anyone else had all those wires behind the lights like that.
now i know 😂.
Remove the scotchlok connector since it isn't connected to anything and repair the wire with solder and shrink wrap with sealant.
Then proceed with your testing/probing.
Remove the scotchlok connector since it isn't connected to anything and repair the wire with solder and shrink wrap with sealant.
Then proceed with your testing/probing.
hey Tainter,
will do when i get back on it.
decided to hit the trails today and may go back tomorrow. Needed to enjoy my rig for a bit.
ill update when i get back to it. Trying to borrow a tracer so i can figure out what all that mess is.
merry Christmas 🎄
It is a bad BCM. No out put from brake circuit.
still haven’t been able to find a replacement.
i am just getting a lot of out of stock and unavailable.
any suggestions other than a junk yard ?
Dig it. I found one on ebay and got it ordered.
hopefully it will be ok.
this is the second one that has had the same issue so now we’re trying to figure out why it keeps killing that circuit.
were going to remove all the trailer construction and replace them and see if that could be the problem.
thanks Doc I appreciate you as always
ill update again soon.
