Pulled out 11/03 and all was well, light check ok. 43 miles down the road the hounds needed exercise and a quick stop at lightpole/fire hydrant and the reststop lawnmowers rear wheel.
So getting back to pull out, a quick light check again and oh-oh - no right brk or directional. No problem, 2 screws and a bulb change-still no light or blink on the trailer but there is on dually. truck is fine does all light checks. Bad wire? Right tail lt is okay with the old (one in when we left out 43 miles back) and the new one we just put in at the reststop with the yellow watered rearwheeled lawn mower.
Additional 35 miles down the road and we make the campground for the rest and recuperation of the inhabitants of the 2004 Wildcat 27RLKS.
We do some fancy wire chasing and can find no opens in the trailer wireing, applied 12 volts to the right signal wire of the plug from the onboard battery and the light works in the right rear of the trailer. Thus the wireing in/on the trailer IS good as is the bulb.
So if the truck works and the trailer works (by itself) that leaves the harness put on by the factory??? I tried yesterday to get into the harness wire looming and man it's miserable!! Dually has got the "stump-jumper" ground clearance (plus the spring blocks on the axles) and I've got a 32 inch sleeeve length. Thought about letting the air out of the 4 rears to get the top crossover loom down so I could open it. Anyway I have found no breaks in the wire, have a really stiff neck and sore shoulder, a bruised elbow and an attitude!!!
To get home I stuck safety pin in the brown with red (could be orange) tracer at the main frame area before any connections to the rear of the truck come out of the wire loom and twisted a wire on the pin and stuck that into the right light hole in the 4 pin flat connection on the truck. We have a light at the end of the trailer Houston, so its a go!!! BUT waita minute we still get no steady brake light at the right trailer light.
SO - HOW are the factory connections made? They have this really neat as in tidy and neat as in wow, very good shrink insulation on each connection. If they are soldered I may have a cold solder joint that has let go and the shrink tube still has it in place.
But why do I get the blinking signal from the truck harness and not the brake light on this wire? Isn't the selection made up at the steering column when you turn your signal that it directs the power to go as a blink to one light and a brake signal to the other when you step on the brake? If I get the right signal on this brown and red tracer why don't I get the brake on this wire when I signal a left turn or just step on the brake for a stop sign?
Have I missed a wire connection that somehow is different for the brake, like TWO wires, one signal other brake? If so how did they get the two wires into one for the trailer harness?
I have come to the conclusion that I only know enough to be dangerous, not enough to fix this probably simple problem.
I hope somebody out there can make sense of this and help me get the right trailer light working with the right truck light. OH, have a Jordan 2020 brake controller so the trailer brake lights do not go through the brake controller. That was discussed at the campfire for two nights! Anybody got any ideas? I'm all ears!

 

Alway with any wiring issue on any trailer.

Step 1=Check the ground

Do not rely on the ball to ground anything. Connect a known good wire on the vehicle side as well as the trailer side.

Step 2 in your case will be to inspect the sockets on the light fixture.

I'm betting you won't need to go further than that.

 

Simple things first.
Did you check the fuses under the hood. The trailer lights has its own fuses that are separate from the truck lights.

P.S. Maybe your hounds watered your trailer's right tail light and that blew the fuse.

 

How many pins on your trailer harness?

Are you using an adapter?

Brake and turn should be two seperate wires.

 

great point! i went two hrs doing just what he is and in the end it was only a stupid fuse . guess u gotta learn somehow