Troubleshooting No Trailer Brake Lights with 2004 Nissan Xterra Factory 4-Way

Question:

I have a 2004 Nissan Xterra, I put the original wire harness for the trailer, everything works except for the brake lights, any suggestions? Thanks

asked by: Felipe T

Helpful Expert Reply:

If your 2004 Nissan Xterra is equipped with the factory 4-Way connector and only the brake lights aren't working (but the turn signals work fine) on your trailer I recommend checking to see if there is a fuse dedicated to the trailer stop lights and replace it if needed. The fuse box lid inside the main passenger fuse compartment should label the different fuse locations and their functions.

If the fuse looks fine or there is not a fuse for this purpose then there is likely an issue with the factory wiring or the converter box on your Xterra. You can try inspecting the wiring as far as you can for any pinched or damaged areas that need to be replaced.

If you aren't able to find any issues then you can take the vehicle up to a local shop or Nissan dealer for them to take a look but it might be quicker (and cheaper) to simply bypass the factory 4-Way by installing a new universal harness with converter like the Tekonsha # 119178KIT. This will tap into the separate signal light wires of your Xterra and the included converter box will combine the separate turn and brake signal wires to standard tail light wiring.

I have attached the written installation instructions that you can take a look at as well.

expert reply by: Chris R