I might be out in left field here. I have a 2005 CCD International 22'.
My pump did work but it would not prime - no prime no water flow. That issue was an air leak in the fill pipe that had a nice screw-driver hole from a prior time not under my watch LOL. Once the hole was sealed - pump primed and poof water was flowing.
Next issue was something like yours. The following year, after de-winterizing I had no water flow in either the bathroom or kitchen. I turned pump on and there was no noise and no flow.
Thought maybe it was electrical - but as it turned out - the pump had primed and water lines were full. I did not realize at the time - I had turned on the pump and went to the lou, not expecting any issues. I had flushed the toilet but did not cross my mind - but when I went to wash my hands - no water!
While scratching my head thinking that is strange. I hooked up the city water and same thing no water. (then I remembered I had flushed the toilet) so water was coming in with the pump - so flushed again and yep city water is working in the toilet but not sinks.
Hmmm - simple solution check at source. Took both taps apart and yep it was grit (from hard water at the park I was staying at before) that had lodge the brass cylinder closed even when the tap was open. Bathroom solved. (must have happened during the travel - bounce.
The kitchen was the inside sprayer - the filter screen basically calcified! and stopped the water. I did have a good 2-3 days before needing water - so it must have dried. As I use facilities and have a water jug when on the road.
Moral of the story - check your taps thoroughly remove the sprayer end and see if you have flow. Second - hook up city water and see if you have flow thru your taps to rule out tap issues.
Maybe you have done all that - not sure.
PS another time my pump just gurgled and no pressure - that was a broken clear bubble screen on the pump - got dinged one year I did not catch the freeze in time before winterizing.
Another thought....if you know you have water coming from your taps (i.e. city line) but pump not working at all)
I had intermittent electrical mysteries that made no sense - especially when everything when I tested was as it should be. Nothing was consistent. Turns out it was my main ground on the frame - mine was located up at the front just back of the A-frame. It was pretty corroded. So took it apart ground rust and paint and cleaned the wire. Poof everything worked properly and constantly. It is now part of my bi-yearly maintenance - to inspect the main ground (along with all interior grounds, and tighten wires at 12v
bus and AC charging and fuse unit.) I take off the front panel making sure my main ground from bat to charger is nice and tight as well. It had come loose on several long road trips. The dang Interstates are brutal on our babies.
Good luck - hope you find the source.