Thanks Krazyk.
I think that's what's going to have to happen for me - trial and error and just fix the darn thing myself.
It's funny, I never expected luxury with the toy hauler, and when I saw this fancy 4 jet shower (that I;ve only seen work once, at the dealer) I thought it was a bit much. I would have much preferred a shower solution that was too simple to break.
I bought the toy hauler because I liked the room and the "back porch" for my dog. He's older, and when he's tired of traveling with me, then I can move my motorcycle in here.
In answer to your questions, yes, I've tried the shower in all possible configurations, looked under all the panels I could find to remove, etc. The thing that bugs me is I had the major leak early on, and I;m trying to determine whether the leak caused a short on the valve/relays (if in fact that's how it works).