All ActivityMost RecentMost LikesSolutionsRe: Both blinkers flash for right and leftI have no issues with cutting holes in the walls of my house to diagnose any issue because I know how ti fix it. After learning what wires were what and figuring out how to pop off the tail light assembly, I looked at the right one first and it was wired properly. Brown wire (RT) to the red lead. I take off the left tail light and what do I find? The installer had coupled the red wire (LT) AND the brown wire (RT) together and connected that to the red lead. That explains why both light blinked when either was turned on. Right or left, each was always getting power. Cut the red wires and into a separate connector and it works perfect. When I started the topic I had no clue about any of this, and you people educated me to the point where I had the knowledge to recognize how it was ****** up when it left the factory. THANK YOU, THANK YOU. If we are ever in the same campsite, I will offer you a beer!!Re: Both blinkers flash for right and leftI am learning from you people and the interweb. After a few searches I see the ESCO KAL wiring harness has 6 wires (yellow being aux), with red(LT&B) brown(RT&B), green(tail lights). The harness wires go in to, (I wish I was smart enough to know what every part was called) a rectangular rubber "thingy", and a red, brown, green set of wires comes out the other side and goes to the back of my trailer. Anyone who has forgotten more that I will ever know is laughing at my ignorance. Anyway, it looks as if the right wires are indeed going to my tail light modules.Re: Both blinkers flash for right and leftTested as you said. Put wire from 12V to right blinker and both right and left lit up. Put 12V to left blinker and both lit up. Not sure what that means. :) Also did same with running lights and they all came on as they were supposed to.Re: Both blinkers flash for right and leftTested as wnjj suggested above. Touched 12V to right turn signal and both flashed. Same with left turn signal, both flashed.Re: Both blinkers flash for right and leftTested as you said. Put wire from 12V to right blinker and both right and left lit up. Put 12V to left blinker and both lit up. Not sure what that means. :) Also did same with running lights and they all came on as they were supposed to.Re: Both blinkers flash for right and leftI wasn’t going to try and pull off the taillights until I know if the dealer will fix it or not. It looks as if I have to break the waterproofing around the top of the lights and then I hope the just twist off.Re: Both blinkers flash for right and leftAll other light functions work.Both blinkers flash for right and leftOn my Flagstaff T12rb when I turn on either the right or left turn signal, both right and left flash. It has a 7 pin connector as does my truck. I tested the truck to make sure that side sends iut the correct signal for right and left and it does. When I look at the wires coming from the trailer harness there are only six wires running to the trailer. I can see the yellow wire (left turn) was cut off and is not connected to the trailer. Is there anyway this ever worked without that wire being connected. BTW, it was this way when I drove it off of the lot in 2021. If they refuse to fix it under warranty is it as simple as connecting a wire to the yellow and run it back to the left rear light? Not that getting at the back light will be easy.