The headlights do not always come on when operating the high/low switch. Sometimes they come on, however they don’t come on every time. I’d like to know if there is some part, other than the h/l switch that will cause this intermittent situation? Thank You for your knowledgeable response.
When looking at the diagram it appears the only options would be the wiring, the switch or the Lighting Control Module. If equipped with DRL (Daytime Running Lights) there is the addition of the DRL Module.
Headlights without DRL wiring diagram
(best viewed in Chrome or Firefox)