Well, he didn't say 'voltage', he said 'current', but that is wrong anyway.
You CAN blow a bulb with too much voltage, but all that is available is 14.7v,
but there is no way to force more current through a bulb, it is, after all, just a resistor.

I would look for a loose connection, either B+ or ground, because high frequency voltage changes CAN blow a bulb due to the heating / cooling of the filament.