For that try to jump the switch to get hydraulics to move - you need to jump more then one connection.
12 volts positive and negative to get eh pump running, and while the pump is running you need to jumpt the solenoid for the rams you wish to move, eg either landing gear or slide rooms.
That DPDT switch (double pole double throw) is doing that for you. In one direction it is operating the pump and the solenoid, in the opposite direction the switch is still operating the solenoid and pump, but reversing the pump direction.
Easiest way to jump it with a broken switch - is with another switch.