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I am sorry that you have not been helped yet.
The controller isnt variable amperage, so there is nothing you can do to adjust power to it. It is simply a weak motor and will need to be replaced.
For the pump, I need the VIN number to pull up wiring schematics to check for either another fuse or a relay in the system
ok, you are getting power to it then, so not the fuses. You need to check the ground wire for breaks or cuts in it and repair wire