The myth is that it is always the bulbs. Sometimes it's a bad bulb, sometimes it's somewhere else in the circuit, as in my case it was open at the fuse. The misconception occurs because the idiot light has a bulb on it, sometimes people think it must be a bad bulb when the message conveyed by the idiot light is that there is an imbalance in the circuit usually caused by a vital light not being lit. Like I said, sometimes it's a bad bulb, sometimes it is somewhere else in the circuit.