[A horse with no name]

Hi, I have had no need to use them, but the overnight park lights did work in the past...When I now switch to turn on the overnight park lights, say the right side, all of the park lights, both front and rear go on. This happens when I switch to the right or to the left side. My brake, turn signals, including the four way flashers, work well... If anyone can help me out with this issue it would be most appreciated.

Thanks