My electrical connection from my camping trailer to my truck hitch is no longer charging the trailer battery. I've narrowed it down to the fact that something is amiss with the connection on the truck, it is a seven prong and at least one of the prongs has no juice. My normal fuse box seemed fine. Is there another fuse location for the hitch electrical? Any suggestions? Should l take it to an expert? Help?

Hi
Are ur electric lights working on the trailer when u have it hitched & connected
to ur towing unit? Running lights? Brake & turn signals?

This can tell u a lot about the overall condition of ur connectors. If so-and battery connections r all good. Really would be less expensive to take it in. Wiring manuals
Can be difficult to obtain. Depending on ur units.

l had to order & replace the plug in connector on my SUV least year. It actually went bad. Only cost about $20. for a new one, & they just plug in under the wheel well. Or some in the spare tire area if it is an inside one.

Still less expensive to just take it in. Certainly with camping season here no need for any out of town issues.