DODGE HEADLIGHT DIMMER SWITCH

I Am Having Trouble With The Lights On My 1989 Dodge D 150. It Seems That One Of The Sealed Beam Headlamps Were Not Working, So I Replaced...

When Driving Headlights Will Turn Off. They Flash Some Then Go Off Completely. All Other Lights Work. (Park Lights, Blinkers Brake Lights...

My Truck's Headlights Have Gone Out, I've Checked The Fuses, And The Lights Themselves. The Dimmer Switch Appears To Be Working Because...