Replaced all the bulbs with Osrams, finally the exterior lamp out warning indicator turned OFF. However, when I press on the brake pedal there are still no brake lights. So....I took an emery board to #6 fuse and removed the lamp control module relay and cleaned the contacts with an emery board then sprayed everything with electronics cleaner. I then allowed it all to dry then reassembled. Still no brake lights! I'm thinking I need to check the brake light switch under the brake pedal........what is the best way to check it out?