Again, my headlight switch isn't factory, therefore I needed to dissect the harness and outfit each individual wire with the correct terminal. Using the Painless manual and labeled wires, I plugged the wires into the appropriate terminals on the switch. As for the rest of the components (e.g., power windows, air conditioning, neutral safety switch, etc.) I simply located the Painless wire and connected the dots. Again, the detailed instructions practically hold your hand as you work through it.