You mentioned Myrtle Beach and I think a site in FL.. Where are you?
I'm off Exit 49 on I-95 in GA (about 3 miles N.W. of exit) and .. Well, this sounds like the kind of thing I've diagnosed on occasion.
50/50 on if I can fix it,, but around 90/10 on my ability to figure it out hands on. Way better than CW.
Oh, if you come visit.. 35/night I think (might be wrong, not my campground after all) and Thursday is the evening to be here.
Home is where I park it!