Trailer Light Issue
 

My running lights for the trailer arent getting any power. Everything else is working (blinkers, brakes, hazzard). All of the trucks lighting is working properly. Is there a separate fuse for the plug in? Im not getting any power out of the female connection for the running lights... Need help quick cause Im leaving with a trailer for Illinois Friday, and have to leave the truck at the tire store to get 35s put on and am having a root canal tomorrow...

Sounds like you need to start with a tester and check the wire at the connector on the hitch and work your way back. Someplace between the pin and the split in the wires where they branch off to the various locations you have a break in the wire.

By the way, what part of the state are you headin for here.

Golconda, its just above Paducah KY.

happened with the boat trailer once, check the ground and make sure its a good one, the one on my boat didn't have one cause it was galvanized but making a better ground fixed my problem

X2, i had this issue whe i switched over to LED lights on my trailer, everything wrked except the running lights, grounded the trailer and whola, they worked.

Typically with a grounding problem you will either have power to the trailer or not. My guess is that when you were movin wires around to fix the grounds you wiggled something back into place that fixed your lights. Most lights are also grounded right at the light itself, you only have one wire coming form it and that is the hot wire. The ground is attached to the screw holding the light on the trailer and your ground itself is the trailer hitch and ball connected to the truck.

im pretty sure its the ground, it was probably too much resistance from not having a strong ground, and the running lights wont work, and the signal light and the braking lights are as just about as bright as the running lights should be. scratching the paint off or cleaning the film off the trailer for the ground fixed my problem as well as 06 diesel's. i did not touch anything else besides that.

i had even checked with a 12v tester at the trailer connection and it was getting power, but looking at the trailer it looked like they werent. if you get the chance to try it out with the 12v tester and have some one turn on the lights and brakes and signals, you should be able to tell when the running lights should be on because the testing light wont be as bright, the difference should be very noticeable, its they do work at the trailer plug check the grounds and make sure they are good

Always exceptions to every rule of course, but typically if one light is out then you have a bad bulb or a bad ground at the light. Just check and or replace the bulb and pull the screw out of the light housing and clean the rust off of it.

If you have a single group of lights out, such as the running lights then you need to start at the truck plug and make sure you have juice there. If so keep testing it along the trailer until you get to a spot with no juice and that locates the break. At some point that one wire will branch out to however many wires as you have seperate running lights. The problem will be in between the trailer plug and the wire split since all of the running lights are out.

If it is just a grounding problem, driving the truck a few miles with the trailer hooked up should fix it. This just gives it time for the trailer hitch and ball to make a good connection and rub the rust loose.

Im not getting any power at the trucks outlet, so the trailer's ground isnt the problem. They were working last week.