Intermittent headlight issues. Running light operates on left side only, when start vehicle and switch on full headlights, right side light on alone. Replaced both lamps, then switched sides same problem. Some days all works properly and then back to original problem. There is NOT a fuse or relay that I can see designated to the Headlights. This started with the headlight warning light coming on , it disappeared after I replaced what I thought was a faulty lamp, but the problems persist. I'm using the #9007 replacement bulb as recomended. Any help would be much appreciated.