Yep, it does, and you would think it would only go in one way. However if you try hard enough, it will go in just fine upside down.  With these adapters they sometimes do not have a big enough of a tab to prevent this.  Its not hard to get it in upside down but goes in smooth with it correct.

On 10/24/2022 6:48 PM, dan penoff.com via Mercedes wrote:
And pardon my asking, but was this with a 7 pin (round) trailer connector? 
Those have a rib on the plug that will only allow it to be inserted into the 
socket one way. I’m confused.

-D

On Oct 24, 2022, at 7:35 PM, Kaleb Striplin via Mercedes 
<mercedes@okiebenz.com> wrote:

Yes.

Sent from my iPhone

On Oct 24, 2022, at 6:16 PM, dan penoff.com via Mercedes 
<mercedes@okiebenz.com> wrote:

Dude, it’s ALWAYS your fault, no matter how you lay things out. You haven’t 
learned that yet?

-D

On Oct 24, 2022, at 7:14 PM, Kaleb Striplin via Mercedes 
<mercedes@okiebenz.com> wrote:

I figured out what she did.  She managed to plug the adapter in upside down 
which sent the 12 volt acc straight to the ground of the 4 flat on the trailer. 
 It burned that wire all the way to the frame of the trailer.  In looking at 
the adapter, the 4 flat ground is fused to the adapter and I can't even unplug 
it.

I replaced the tail light module, and problem was solved, at first. As I was 
explaining to the wife what she did, which she then turned it back to being my 
fault because I did not tell her how to plug it in, the damn lights came back 
on.  The module has 4 harnesses that plug into it.  I started pulling them and 
replacing, and somehow got them off.  Lights were back to working like they 
should.  The module slides into a bracket which them bolts to the frame.  I was 
going to leave it loose to make sure it actually continued to work, but then 
decided to go ahead and mount it as it was working fine.  As soon as I started 
messing with it, the lights came back on and I could not get them back off.  I 
looked at the individual wires coming directly out of the connector on the 
truck and none appeared to be melted.  I guess I will have to take a closer 
look as there has to be something melted within the harness.  I hope it did not 
screw up the new module, or possibly the old module was not really bad.

On 10/23/2022 8:11 PM, Kaleb Striplin via Mercedes wrote:
I guess on the bright side if she was towing it with the GL and the trailer 
wiring shorted, it might have fried the rear Sam. It looks like the brake like 
module in the back that I suspect it fried is only $25 at the flaps.

Sent from my iPhone

On Oct 23, 2022, at 7:07 PM, Buggered Benzmail via Mercedes 
<mercedes@okiebenz.com> wrote:

Maybe she needs to purchase her own vehicle she will be responsible for. If 
she wrecks it or otherwise trashes it she can deal with it.

--FT
Sent from iFōn

On Oct 23, 2022, at 8:02 PM, Kaleb Striplin via Mercedes 
<mercedes@okiebenz.com> wrote:

Back when we were daily driving 123s she managed to kill some of those too.

On 10/23/2022 7:01 PM, Buggered Benzmail via Mercedes wrote:
You need to get her a 300TD that will be immune to all that nonsense

--FT
Sent from iFōn

On Oct 23, 2022, at 7:32 PM, Kaleb Striplin via Mercedes 
<mercedes@okiebenz.com> wrote:
Just from some quick research, it appears there is a body control module that 
may have gotten fried.  This is great.

On 10/23/2022 6:29 PM, Kaleb Striplin via Mercedes wrote:
Since she killed the air suspension on her GL somehow, she had to take the 
truck this weekend to haul the enclosed trailer to her show. When she went to 
leave, she had somebody hook up the trailer and plugged it in.  She says a few 
minutes later she notices smoke coming from the wiring harness at the trailer.  
Somebody taped it up with duct tape but now she reports right turn signal not 
working. She gets home and of course I have to back in the trailer.  I 
immediately notice an odd scrapping sound coming from the steering wheel that 
has never been there before.  After backing the truck in I unhook the trailer 
and of course the ground wire is now bare all the way to the frame of the 
trailer. I can tell much else with mess of duct tape but it somehow managed to 
short at some point in the harness.  The wiring where it starts going into the 
channels back to the lights look fine so the short must be closer to the 
connector. Regardless I am sure I will have to replace the end of the harness. 
I was finished messing with it for the moment when I noticed as I was coming in 
the house that the brake lights are on even with the truck turned off.  WTF?  I 
pull the fuse and the rears go out, but the top mount one by the cab stays on.  
I cant find a fuse that will shut it off.  I got under the dash and unplugged 
the brake lite switch and they still stay on.  I am not sure if this 2002 is 
new enough to have the lights controlled by a computer, or if this trailer 
situation shorted out something in the truck.  What I find odd is the truck has 
fuses for the trailer lights, why didnt it blow?  I sure hope I do not have a 
major wiring problem now.  It is unbelievable how this stuff happens seemingly 
without fail when she drives a vehicle.  She has another show next weekend.  
Now that the truck is down, there are no tow vehicles left to tow her trailer 
assuming I have time to fix the wiring on it.  I guess if she wants to go to 
this show bad enough, she can rent a vehicle of some sort.

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