Ok so on my buddies 1997 gmc suburban the problem first started out with the left turn signal not flashing but staying on. Then to both of the blinkers not working and now the hazards do not work. Ive replaceed the flasher and checked all the bulbs. And now we figured out you can turn the blinker on and once you apply the brake while the blinker is on it will flash. And now the interior lights are randomely coming on and off. Coming on at night and every morning the battery is dead. Imnot sure what else it could be besides a bad ground or maybe the turn signal switch. Im clueless any help would be greatly appreciated.