No diodes shown on wiring
diagram. The only place that I can see for external diodes would be across the solenoid coil terminals, the blue/black, white/black wires. These diodes would prevent arcing off the control switch contacts when the switch (joystick) is turned off. Correct polarity would be the diode's cathode to the white or blue wire and anode to the black. Cathode terminal is usually marked by a band around the body of the diode. Reversing the diode would cause full current
to flow through the diode blowing the 5 amp fuse and a diode.
Divide and conquer is the strategy now, eliminate the controller and cable first by disconnecting the control cable.
Is the motor/solenoid unit wired as shown in the diagram?
Is the main fuse OK and switch on?
Is there voltage to the motor
If so connect a jumper from the blue wire in connector 8 to the black(-) wire. Solenoid should click and the motor
should run. Repeat for the white wire.
If that worked then the problem is in the control cable or joystick.
Are you sure the new 5A fuse is OK?
Do you have the optional delay timer? Bypass it.
Any sign of burns or damage in connector 8,9? Fix it
Is there voltage at the control (joystick) box? No, recheck 5A fuse
If you have voltage then its possible the control box was damaged when the 5 amp fuse blew. There may also be a fuse in the control box not shown in the manual. As a previous post said the manual is not that great.
Hope that helps, let us know what you found.