I have a 2000 saturn sl2 sedan and the turn signals have been acting up for a while... they come on for a while and then stop blinking, both on the dash and on the lights themselves... now they have stopped altogether. Would this be bad bulbs or a bad fuse? All the signals stopped left, right, front and back. I am not a car person and was just going to take it up to autozone... but I'd like to know they aren't feeding me crap.