I'd get a multimeter and check though the circuit - as Brian says the point at which the current is switched is a common failure point - either in the switch or the relay if one is fitted. I've never heard of a body modulator and can't see how one would be fitted in a headlamp circuit!

Low beam headlights don't work, High beam headlights do
I'm trying to move a big site that's currently live onto my local machine so I can edit locally. I'm using Wamp Server. I've tried using the Duplicator plugin but I'm getting several warnings and errors when I try to unpackage it locally. Is there a more foolproof way to do this?

Otherwise, would it be easier to move the live site onto a sub-domain on my personal site? Something like 'site.com/clients/test-site'? I just need an environment where I can make changes without affecting the live site.
