JEEP RUNNING LIGHT NOT WORKING

Left Rear Turn Signal, Brake Light, And Tail Light Wont Work When Headlights Are Switched On. Otherwise They Work Fine

I Have The Vehicle Listed Above Xj. I Did Some Investigating And Was Told That It Was My Headlight Switch. I Purchased A New Switch And...

What Could Cause The Tail And Brake Lights To Stop Working Even When The Light Bulbs Are New.