M30 has intermittent brake light issues. The switch was replaced, the switch buttons have been replaced on the brake pedal too. After switch and buttons were replaced the brake lights worked for a while then stopped. After pushing on the brake swich a couple of times I started to hear a clicking sound like a relay and then the brake lights were working. They worked for a week and then when out again. Now I can't get them to come on and there isn't a clicking sound. Is there a relay associated with the brake switch? Help....