This is my first day on the list and I'm already in need of help.

I wish to tow a trailer wired with two taillights and four wires leading to
the hitch which I have determined to lead to each of the taillight filaments
in the respective bulbs. These bulbs, with their two filaments each are
apparently supposed to provide for all three functions (running, turning,
stopping).

Of course, my vanagon has a separate bulb (and circuit) for each of these
functions so I'm stuck with the problem of fitting three circuits into two
circuits.

Can anyone help?

 Thanks,

Tom Ryan
Shelton, WA