Two Terminal LED Flasher for 1965-1969 Mustangs.
This is required when using LED parking lights (PLLED1) and LED taillights (TLLED12, TLLED13 or TLLED14). When using LEDs, your stock flasher mechanism cannot engage properly, due to less heat given off from the LEDs than original bulbs. The two terminal flasher allows your flashers/turn signals to work properly when using LED style lights. Car requires one.