Trailer Lights

If your trailer is equipped with the typical metal junction box with wirenuts on the connections then you may want to upgrade to something like this. The connections are more secure and the box is also more weatherproof.

Link

pulled the cover for the junction box and noticed rate away a wire came undone from all the wires for the lights..reconnected and all lights and running lights work

Have you pulled the plastic hood off the 7-way plug on the trailer to see if a wire came loose from a terminal?

Just checked with a friend that stopped over and it did not work with his 7way so this confirms that its the camper side...I checked all fuses inside and out but nothing was blown..I guess i will uncover the junction box on the outside and go from there

One of the receptacle terminals on the TT 7 pin plug is supposed to power the running lights.

One of the receptacles on the TT 7 pin plug is supposed to come from the battery.

According to the latest issue of Trailer Life magazine, if you jump the 12 volt receptacle terminal to the running light receptacle terminal with a fused jumper wire, the lights should light. If the circuit is open they will not light. If the circuit is shorted it will blow the jumper wire fuse.

A fused wire jumper can be purchase at the auto parts store.

If this is too complicated, sometime it is easier, though more expensive, to let the pros do it.

So i changed out the 7 way/4 way on my truck hoping this was the issue but still no running lights on the camper..I am completely baffled on what is causing this.

So, maybe you need one of these, too.

so the harness part is right for truck end but i need it to be wires on other bc i had a aftermarket hitch and 7 way put on my truck bc it didnt come with it

mike-s wrote:
That's the trailer side wiring. His problem is on the vehicle side. Depending on where the wires are damaged, this might be what he needs.

Sorry, I didn't understand. I think you got it right.

That's the trailer side wiring. His problem is on the vehicle side. Depending on where the wires are damaged, this might be what he needs.