Air Cooled Bruce posted a Tech Tip on July 18 thread "Towing vs Trailer"...
"I wired into my speedster (VS) lighting using a 4 wire flat plug. Very simple. Run the green wire to the Right turn signal on the front. Run the yellow wire to the Left turn signal on the front. Run the brown wire to the Left parking light. Run the white wire to the body connection end of the battery ground cable. All are easy to reach and very short wire runs. The flat connector is wrapped around the horn once and tie wrapped once. To use......cut tie wrap and feed out through the left turn signal grill to connect up. Keep a flat plug dust cover on the connector to keep dirt and water out when not in use.
When in use, the front parking lights are on along with the rear tail lights. This lights up the back of my white GMC a little for better viz. Also the front signal lights flash along with the rears which gives me better side viz. The same goes for the brake lights and Really lights up things. Since my truck tail lights/etc are so high, they can be seen from the rear of the Speedster as well. I'm pretty comfortable with this arrangement. When in tow I flip the bat switch off just for good measure for when I'm towing anyway I think it just looks a little nicer with out having the big tow light assembly on the back somewhere. Other than that...both work" - Bruce
Knowing how 'attentive' other drivers are, I prefer the larger, brighter tow lights positioned on the Speedster at eye-level of following drivers.
I'm just saying....