Troubleshooting Passenger Side Trailer Blinker Light Not Functioning

Updated 02/08/2018 | Published 02/07/2018

Question:

Im having a problem with my passenger side tail light on my trailer it gets power as running but will not signal or break could this be caused by my wifes tow relay i have checked all wiring and all checks out

asked by: Philip

Expert Reply:

If voltage is making it to the wiring of the taillight on the brake/turn circuit but it's not functioning that would indicate that the problem is most likely a weak ground for the light assembly.

Try improving how the light grounds and it will most likely start to work again. You can also run a jumper wire back from the light to the main ground circuit of the trailer's wiring to see if that fixes the problem.

I attached a help article on troubleshooting trailer wiring installs for you to check out as well.

I am not sure what kind of relay your wife would have installed so I am not sure if that's a possible problem either.

expert reply by: Jameson C