When I was still drivin big truck instead of tellin another driver he/she had left their turn indicator or 4 ways on we just told them hey xyz truckin yer gonna run outa blinker fluid.
I recollect bunch of us were rollin some where around oh dark thirty in the A M and someone asked when you turn off your turn indicator or 4 ways mid flash where does the rest of the flash go? At the time it were good fer a chuckle and some banter on the C B to help some miles go bye!

Also recolllect there were NOT any electrical engineers in that discussion! RIDE SAFE.