Right people bit of a strange one here.

The Mrs and I own a mk2 1.6 16v petrol focus on a 2010.

The nsf headlight bulb won't work. I've replaced the bulb,check the fuses.

I've plugged the nsf headlight into the osf and the head light works. Ive found the live feed to the headlight. As soon as i plug the headlight back in the live feed/wire turns to a earth??

I'm thinking is the body computer at fault.??