Had-still have the same problem. A year or so ago, I pulled the faucet panel off the wall and found the hand hose kinked and the valves not wanting to open. No water would flow with either city hookup or pump. Not sure if the valves can be fixed or if I need new ones. IIRC, the valve knobs turn ok, but seem to be stuck closed or either there is a complete blockage on the inlets.
I never use the outside shower, so it is low on my repair list. I should probably get roundtoit soon though.