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I haven't had this truck very long. I'm sure the glove box was completely empty when I bought it. I don't think there are any extra relays/fuses anywhere.
So are you saying that my interior trailer lights will work if I just plug something in (relay?) into the fuse box? So the problem is a fuse of relay? Obviously, there is nothing wrong with my trailer since the lights work with my '03 truck.
Are all the fuses and relays in place? My '13 came with a relay and fuse package in the glove box that had to be installed. I had to install the extra relays for the battery power and reverse lights on my '01 F250 as well.
I just made a liar out of myself; found something that might be a fuse and relay in the glove box.
I just made a liar out of myself; found something that might be a fuse and relay in the glove box.
Now where do I plug them in?
Thanks for all your help!
This relay and fuse are required to charge the battery in your trailer. If there is another problem in the truck preventing the lights from working, you will need to plug in a tester into the truck plug to see if all the circuits are working. Your local auto parts store should be able to order one for you. Or just go to any trailer dealer. They should have one.
Look at the photos of the fuse box in your own quoted post above to see where to put the fuse and the relay. The photo shows a finger pointing to the spots where the fuse and relay go. The fuse box layout with the fuses labeled is in your owner's manual. If you don't have the owner's manual, download one here and look on page 334 for the fuse box: http://www.fordservicecontent.com/Fo.../11f12og3e.pdf
Last edited by atwowheelguy; 03-17-2015 at 12:58 AM.
Interior trailer lights do not work the same way as the exterior tail lights. running lights, parking lights, etc. Instead, the interior trailer lights run off the battery in the horse trailer, or off the 12-volt hot wire in the trailer plug. So all your traler lights could be working except the interior trailer lights would not work until you get the trailer wiring done right.
There are two different 12-volt hot wires in your 7-pin RV trailer wiring plug. One is primarily to charge the "house" battery in the trailer, and the other is called the auxiliary hot wire. The auxiliary hot wire is not often used, but when it is used it might be for backup lights on the trailer, or interior lights on the trailer, or both. Or a porch light near the hitch?
Anywho, long story short, you must install that relay and fuse you found in the glovebox before the 12/volt hot wires will work. Study the wiring diagrams and fuse-box layout in the Owner's Guide to see where they go.
03-16-2015, 10:24 PM
Do I understand this properly?
Ok, I think we are making progress....
Now that you're educated, pay it forward to the next one who is mad at their truck.