Headlights dash lights flicker
My 98 5.9 has an issue with the headlights and dash lights flickering, normal to dim. It happens quickly. I checked alternator, changed relay and headlight switch. If I start the truck with auto lamp on, they flash like a police car. Normal on position, they just flicker. I do have option auto lamp on during day and I turn on wipers, headlights come on . I didn’t see any aftermarket add ons, could be stock from back then. I’m missing something, I just don’t know what.