It has a NEW, Ford, turn signal switch and I believe

The tail lights work fine, brake lights come on, turn signals work, side markers work, emergency flasher works. When I hook up the front turn signals everything goes goofy.
If I put on the left signal both front and rear flash brightly, but the right side will also flashes dim along with the side markers. It also does the opposite when the right side is on. It doesn't matter if I disconnect either front signal, it still does it.
Any one have any ideas?
