Good news Everyone, our HWH slide switches are working again, many thanks to Tom Cherry who guided me through the Monaco prints and shared his safety concerns and to Terry R, who shared his knowledge and fix for the failure inside the HWH control box that he had experienced previously, saving us a lot of trial and possible error.. The big relay on the motor was fine and we now have a spare and some new soldering stuff for another adventure..
The motor start circuit activates every time any hydraulic slide moves, so a robust fix is good to have..
Thanks again
Laura and Trevor