I built this today to test the lights on various trailers that I own without hooking up the truck. I used an electronic flasher vs a thermal flasher because I have a trailer with LED's and they don't draw enough current to make a thermal flasher work correctly. Thought I would share if any would like to make one.
http://i267.photobucket.com/albums/i...t/IMAG0366.jpg
http://i267.photobucket.com/albums/i...t/IMAG0367.jpg
http://i267.photobucket.com/albums/i...t/IMAG0365.jpg
http://i267.photobucket.com/albums/i...t/IMAG0364.jpg
http://i267.photobucket.com/albums/i...t/IMAG0363.jpg
http://i267.photobucket.com/albums/i...t/IMAG0362.jpg