I am just trying to figure out what wire i have to tap into to get power. The instructions are not specific to my truck so it isn't clear as to where to get the power from.

I also want to replace the PIAA switch wit a regular on/off 2 stage toggle switch. Wondering which piaa wire goes to which side. They use three wires because the led in thier switch.

 

the power to run the relay = a fused direct line from the battery.

for your two position non lighted switch you can run another fused wire to your switch and then back to the relay. or you can find constant 12V under your dash somewhere with a test light or a multimeter.