Originally Posted by jk510
Maybe a silly question but, have you checked the power at the pole? They are not always the most well cared for item in the park. You need a volt meter (DMM) and check both L1 and L2. If your rear AC is working it sounds like one of the Ls is dead.
X2. On a 50 amp RV, in simple terms you have TWO 50 amp 120 volt lines feeding the RV. It does sound like one of the lines is not working correct...thus only some of your stuff working, that may all be on the non functioning incoming line.
As jk510 stated above, the first place to check is the pedestal at the park.
This link will help, and click the outlet testing tab on the left:
The voltage between Y and X should be 240-Volt, X and W 120-Volt, Y and W 120-Volt, X and G 120-volt, Y and G 120-volt, W and G 0-Volt
You may find either the Y(L1) or X(L2) is not giving you 120 volts.
You can also have the same thing happening in your power cord, and only one leg is coming all the way in to the RV. We see bad/burnt power cords pretty frequently here in the forums....especially when owners don't twist them good for the final lock, or connect/disconnect the cords without killing power at the pedestal first. Over time, the electrical arcing that occurs will make either the cord, or the attaching point to the RV unworkable.
I would check the campground outlet first. If that checks out, then plug your detachable RV cord into the outlet, but not to the RV. Check the cord now. This way you can eliminate each link in the power chain, as to where the problem lies.
If the cord checks out, then you know the problem lies from where the cord attaches to the RV and in from there.