Bob Acland,
I must be missing something on your idea. If the rig is not quite stock, that must mean it has two lights in back. If you add the dual filament bulbs you will have STOP and TAIL functions. Then you plan to use the other socket for a bulb to facilitate a TURN function.
If you were to STOP and signal a left TURN your lights would only show two bright lights. You would have a brake light illuminated in the same housing with a blinking turn light...what don't I understand. :confused:
Stuart
