Cabby electric roof won't go down......but will go up

My roof has just decided that it doesn't want to go down electrically.  When you press the switch there is no noise from the pump that I can hear. Manually it will drop down and then it will go up with a press of the switch.
Its only just done it today.  A quick check and there are no leaks that I can see and the wiring looks ok?

any suggestions?

Could be a faulty switch…as you should hear the relays click and motor whir even if the roof doesn't move!