Chevy Headlight Switch Wiring Diagram If you're looking for a Chevy headlight switch wiring diagram, you've come to the right place. The headlight switch is a vital component in your Chevy's electrical system, as it controls the operation of the headlights.. DIAGRAM 1: With Quad Headlights The above typical headlight circuit diagram applies to the 1996, 1997, 1998, and 1999 Chevrolet/GMC 1500, 2500, and 3500 pick-up with Quad headlights. NOTE: If you have QUAD headlights, then you'll have a separate bulb for the LO and Hi beams.
Find a detailed diagram and guide on GM headlight switch wiring and functions. Understand how to troubleshoot and repair headlight switch issues for your GM vehicle.. Upgrading or replacing a headlight switch in a GM vehicle requires a basic understanding of how the switch is wired and what each terminal controls.