I had a problem with mine once, and I've put the details out of mind. But IIRC someone told me in traffic the brake lights weren't working. Got it home and the turn signals and flashers worked, but not brake lights. Turned out the part of the turn signal switch that cancels the brake signal to the turn signal so it flashes failed for both sides. So signals and flashers worked, but brake lights on both sides were "canceled". New switch and new cancelling cam fixed it. At least that's how I remember it. And it took some study of the circuit diagrams to finally locate the problem. I'd never heard of this before or since.