As you can see from the illistration/wiring diagram, other than the actual wiring, there are two fuses (one for left & the other for right), two relays one for Low beam & one for High beam), and finally the multi-function switch which must be working to provide a ground for the relays (High & Low Beams). You can Go to
www.hmaservice.com and register your vehicle by VIN #.. you'll then have access to wiring diagrams, shop manuals, service bulletins, campaigns, illustrations and procedures, etc.