You will have to cut the PIAA harness. Cut the switch off the end and you will see three wires. Take your new switch to Auto Zone and ask someone for the female end to that switch. Take your crimpers to the wires and your done. You will have a red, white and black wire from the PIAA harness. You will than have to find out what goes to your new switch.
Buy an add-a-fuse from AutoZone and use that for the switch power.
And if all this sound very confusing, take it to someone that knows how to wire this stuff. You don't want to burn your truck to the ground.
