First all thanks for the add .. We have a 2014 Class C RV and we are having problems with the seven wire hitch in the rear to tow our car behind the RV.. The signal lights and the brake lights work fine but the tail lights and the charge line for the slow charge in the car are not working.. I have checked the fuses and replaced the relay switch and still no power to rear of the RV.. My wife has read where the in cab fuse box would be but there is an automatic leveling system control there.. We have looked everywhere to locate this mystery fuse box but so far have not been successful.. I called the local Ford dealer and they told me I would have to bring it in and leave it with them and no time guarantee for when they could get it done.. We are in Florida at a RV park and that would be hard for us to do.. We also called an RV mobile guy but he told me electrical is not his best.. We just need to know where this mystery fuse box is.. Any help would be appreciated.. Thank you in advance.. It is a 2014 Jamboree Sport that actually sits on a 2013 Ford E450 chassis..

 

It could be a fuse problem, but knowing where that particular fuse is located will not help that much because there is a reason it has blown.
Just replacing the fuse might not correct the problem.
You might inquire if there is a good shop locally that you might ask for advice or assistance.
If there is a good electrical shop in the area, that would be the place to check..

 

I agree that further diagnosis is required to find the real problem.

However, the parking light fuse is F57 (20A), the charge fuse is F63 (30A) and both of those fuses are fed with power through F17 (50A).

The parking light relay is #6 and the charge relay is #4.

All three of those fuses and both relays are in the "Battery Junction Box" (the fuse box under the hood).

 

Thank you for the response , parking lights on the RV are working.. All lights on the RV are working.. I did replace relay for the charge.. but still no power to the seven pin outlet in the rear of the coach.. I will check those fuses..