RepairPal Certified shops can diagnose and repair your 1998 Mercury Mountaineer. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
Just an added note to Ron's very good thought -- always check the wiring connector at the switch, as they tend to overheat and melt, causing the same effect.
back side of brake peddle itself there is a white button looking thing that tells your lights to go on , it came loose , easy to fix with screw driver and 3 minutes time