How hard to wire a trailer?

Very easy.. Just rewire and keep the colors the same on each side.

Its very easy . Im sure youtube has some good videos on it.

Thanks for the advice. I'm going to give it a try this week. I'll report back if it goes well.

The hardest part is getting the grounding right if the trailer is old. The ground circuit has to go all the way back through the bolts on the lights, through the ball (or white wire on plug if it's grounded at the tongue) to the vehicle frame. If it's interrupted at any point, then the lights won't brighten when you hit the brakes. If the trailer is in decent shape this won't happen, but knowing that would have saved me a lot of head scratching. The videos will tell you not to do this, but I just ended up running a ground all the way from the light mounting bolts to the plug, and everything worked fine after.

When you are done and the lights don't work........99% chance it's the ground.

But a new light kit is cheap and easy. Especially if you just need tail/blinkers. Is this for a small utility trailer?

Yes it's just a small utility trailer for lawnmower, 4 wheeler, etc.

Hard wire the white ground to all lights

Dont rely on the common trailer ground

As others have said pay close attention to your ground. If you're having problems with the lights working, 99/100 it's the ground.

I'm not saying it's the ground



But it's the ground

All good info about the wiring/grounding. I redid my trailer a few years ago. Do not waste your time on the wire that comes with the light kit. Get you some 12/2 romex (house wiring) with the ground. Run it all the way to the back of the trailer. Connect the black to your hot, white to your other wire and the ground to where your lights mount to the trailer. Seal the connection good. At the tongue, run a piece of old water hose thru the channel to feed the romex back thru and connect the wires at the tongue. Seal them good and you will never have a wiring problem again. The wiring (romex) on my trailers is at least 15 years old and still works. Let us know what method you choose and how it comes out.