Ok this is weird. I have power going to the socket. Once I plug the bulb in I no longer have power. 2005 f150. No fog lights and I have auto headlights. I have changed the MFS and the Headlight switch.

 

Ok. This is an update. Just changed the high beam relay . Problem still exists.

 

Just a thought, did you use an OEM bulb? Reason I ask is, friend of mine on his car had an issue and fixed it with oem bulb.

 

When I put a voltage meter to one of the 2 fuses for the low beams I have no voltage thru those 2 fuses.. could this mean the fuse box is malfunctioning?.... yes the fuses are good.

 

I would guess that you don't have power to the box or you have a bad ground after the box

 

I have power going to the high beam wire. But when I I stall a bulb I no longer have power going to that wire. I just stumbled on another post with someone having the same issue sometime ago. Hoping he makes a reply. It is the exact same issue I'm having. I'm sure it's related.