Headlight Switch Test
WARNING: This page is about a different car, the 1995 Chevrolet Caprice. However, it is still accessible from the selected car via links, so may be relevant.
Battery voltage should always be present at headlight switch Red wire at terminal "K". With headlights on, battery voltage should also be present at Yellow wire at terminal "E". If voltage is not present at any indicated terminals, check fuse, wiring, and switch.