Upps! I don't want to add lights so the three-wire type is out.
Thanks,
Charlie
Ok then, well you will have to run wires from the signal switch to the parking light housings up front, but I guess that part is obvious. You would either need to abandon the parking light function and put in a brighter bulb for the signal, or change to 2-contact sockets and use two-filament taillight bulbs.
You'll have to forgive me for forgetting what a 41 parking light looks like. If there is not enough headroom in there to get the taillight bulb in, dual-filament park/signal 6v bulbs with a smaller glass bulb do exist. If I remember correctly they are used in motorcycles, probably in Europe. Ebay had them last time I needed some.
Power from the brake light switch will have to be routed to the turn signal switch now instead of directly to the back of the car. From the signal switch it can head on back to the back of the car. That gets you one side.
But, on most prewar cars, and probably the 41, there was only one brake light wire to the back, and then the wire crossed to the other side. That wont work with signals. You will have to disconnect the wire going across the back, and then run one more wire back from the turn signal switch to light the other side up.
