I have an 87 ranger and the headlights will not cone on anymore..both low and high beams. I have replaced the headlights, headlight switch, cheeked power running directly to the headlights themselves, fuses in the panel..what else could it be? I was told to check the relay switch but i can't find where it is located. Anyone have any ideas? Im tired of being home before dark lol..thank you in advance!