Ok I'm having the same issue my brake lights including my third brake light and my turn signals my trunk release my door locks all quit working at the same time I've replaced all the fuses good and bad ones I've replaced the multi function switch I added some extra wire to the pigtail on the harness because the steering wheel would slightly tug it when it was tilted and I've replaced the relay and still the only thing the switch will make come on is My passing lights and my bright lights