1994 Suburban with brake lights that worked twice after I replaced the brake light switch. Am checking the trailer wiring and the ground, but see a lot of reference to the multi-function switch. I've got cruise control (which works) and turn signals (they DO NOT self cancel any more), and the rest of the lights work (flashers, running lights, etc.). In researching, it seems that the multi-function switch can affect the brake lights, but I cannot figure how to test that without taking a bunch of stuff apart. Also, not sure which switch I need as some posts indicate the part costs $300 (multi-switch for cruise / tilt wheel / wipers), and others say $70.00. Any feedback / guidance is greatly appreciated as I really want to fix this on my own.