Specialist part · #10098 · 1 pts
What failure is indicated by a rapidly flashing turn signal?

aWeak battery.
bShort circuit in high voltage wires.
cBurnt-out turn signal bulb.
Why?
Rapid indicator flashing signals a blown indicator bulb. It is not a typical warning of a weak battery or a short circuit in the high-voltage leads. The photograph shows a rear light cluster; the flashing speed is stated in the question.