electrical problem?

got a small problem I can’t quite figure out. with the headlights off the signals work fine. When the headlights are on the left signal works fine but the rights siglnal stays on and the light in the cluster stays on. Agian with the headlights off the left and right signals work but here’s the wierd part, the LEFT marker light blinks with the RIGHT signal. I haven’t checked the blinker relay yet but it works with the lights off.

any one have any ideas?

Thanks

Cody