XtraLargeTall

I was just giving you a hard time haha.

Is it a 4 or 7 pin connector on the trailer? And does your pickup have the tow package?

fx2black

I built a tandem axle trailer to pull behind my 2000 ranger, I put led markers on the trailer and they work great. I have not installed led stop/turn/brake yet but don't believe I will have a problem with that. Wired the leds same as any other light.

flixden

Can you explain this 'not turn on the circuits' thing a little more? I don't understand what was going on there with the Benz.

XtraLargeTall

X2

1M Fan

I know, I'm cool. It had the 7 pin connector. My truck has the trailor package and the trailer brake controller

As for activating the trailer circuits, most new vehicles have separate circuirts on their own relays for the trailer lights. It If the bulbs don't draw enough watts, they won't turn on or you make get a burned out bulb indicator. Looks like it is not a problem with the Fords.

With my Mercedes, I had to rent car haulers with incandesent bulbs. It wouldn't turn on the LED lights.

XtraLargeTall

Have you installed the fuse and relay for the trailer yet? Can't remember where they go exactly but they should be in the glove box in a bag.

1M Fan

My brake controller was factory installed.

XtraLargeTall

But they still leave out a fuse and relay used for the trailer. I think it's for constant power for batteries and such but it doesn't hurt to put em in

flixden

Mine (fuse and relay) were installed at the factory - I am pretty sure about that.

XtraLargeTall

Mine wasn't. Time to call up the lawyer!

But in all seriousness OP, check and see if they're installed or not just for good measure. The fuse box is right there when you open the hood