[tblake]

Mmmmmm good question.

Do you want them to flick on and off quick when you push unlock like your headlights?

If not, you may have to use that signal and set up some sort of a timer circuit and isolate it from the headlights with relays.

Its going to be rather difficult.

Lets see what Mr Doctorhardward says. He must be an electrical guru. He knows all.