A 2 prong flasher is switched in series with the turn lights, and interrupts the circuit to produce "blinking". The three prong flasher does the same except an extra contact is made available to feed an indicator light on the switch.


1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it!
1951 1 Ton Completed


My Chevy Master 4 Door is on the Road!