2002 F450 Headlight problem
I have in my shop a Ford F450 Super duty. The headlights work, high and low beam work as they should, turn signal, running , and brake lights all work. When the key is turned on , or truck running , I have no headlights. Everything works except the headlights. Turn the key off and the lights work fine. I have replaced the headlight switch, ignition switch , and checked every fuse. The switches were replaced with Ford parts. I pulled all the fuses and the lights started working as they should. They work for a few minuets and then shut off. Does the switch have some kind of relay? I can not find any relay in the book for the headlights. Anyone ever run into an issue like this?
1969 x-77 Z/28 orange/ white stripes, named by my daughter "Clementine ", M-22 close ratio, 4:10 12 bolt, CE 302. Hugger orange with white stripes. White standard interior. Restoration complete May 2018