A fast blinking turn signal usually indicates that one of the bulbs is blown. The blown bulb causes a change in resistance...so the indicator blinks faster than normal.

Make sure all bulbs on the side that is blinking fast is intact and working. If you have dual filament bulbs (in either front or rear)...then you need to make sure that both filaments in those bulbs are intact.

See REPLACEMENT LIGHTING info above about the LCM III...this is the reason why all bulbs need to be intact...because if some bulbs burn out...other bulbs can be used instead...but this still will cause the fast blinking due to a drop in resistance.

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