Got a call from my wife's cousin yesterday. He had a Road King (world's loudest motorcycle) with a trailer. Sold the RK and bought a new Trike. After seeing my homemade hitch, he decided to fabricate his own hitch. The Road King was red, the new trike blue, so he stripped the lights out of the trailer to have it painted. He had the pigtail from the RK for color code purposes.
It turns out that the RK and trailer were both 5 wire; ground, running, left turn, right turn, stop. The trike ass end, however, is 4 wire; ground, running, left turn/stop, right turn/stop. So I traced the wires back to a 5 to 4 converter under the seat, and metered out the wires before the converter to attach the trailer lights.
Musta been $3.00 cheaper to put in a converter than 2 amber turn signal lights...


1974 Honda CB200, 1979 Yamaha XS750 std, 2004 FJR1300
Si Non Oscillas, Noli Tintinnare
"The music business is a cruel and shallow money trench, a long plastic hallway where thieves and pimps run free, and good men die like dogs. There's also a negative side." - Hunter S. Thompson