ught an electronic converter that (according to the manual) converts a four wire system to a three wire system for a trailer. They all said "for a trailer". Initially I checked the wiring with the old tail lights for the 1980 camaro that I had and it worked fine (separate lamps). With the converter, the turn signals work correctly until I turn on the brake lights. Then the brake lights only work. A heavy duty flasher does not change things.
