what comes after replacing a brake light bulb and it still does not work? on 2003 Ford Escape

I changed the bulb first, and then actually switched them to see if it was a faulty bulb. It was not, but the driver's side brake light still won't come on. I'm trying to avoid a trip to the dealer, but my auto repair knowledge is between slim and none. Thanks.

Asked by for the 2003 Ford Escape
Look for broken/damaged wiring.check the socket contacts.