OUr 2005 Prius has been intermittently popping on the buzzer/ ABS/ VSC and BRAKE lite, usually when the brake pedal is touched, but sometimes without any apparent initiator. It remains on usually for 10-20 seconds, but occasionally stay on 20+ minutes. Interestingly, often, when the turn signal is activated, it immediately goes off. Dealer says there are no scanned error messages (and of course charged us to tell us that... grrrr), and to bring it in "while the lites are on." Right. It sounds like a short somewhere, but I dont know where to go from here. Any ideas?