Things You'll Need
Instructions
Unplug your PS3 controller from the USB port at the front of the PS3 console.
Turn the controller over and remove the five screws on the outside of the rear of the controller.
Remove the back half of the controller. The main PCB (motherboard) board will be visible in the controller housing.
Remove the single screw in the center of the PCB board and remove the board from the housing. You will now have access to the underside of the trigger buttons.
Loosen the screws so that the triggers achieve the desired give.
Reassemble the controller.