I recently bought a 2001 Dodge Dakota Sport. I like the truck, but can't drive it at night. The headlights flicker like I am high beaming those approaching me. The dome light, when on, also flickers. When all is quiet I can hearing a ringing nose in the engine compartment that basically is in timing with the flickering dome light, and sounds more distinct when you put your ear close to the headlights. Can someone please guide me in the right direction to determine what in the light is going on here???