Hi, I've been having a problem with my cars headlights. First my car tail light and interior light stopped working at the same time .I was told it was the combination switch, so I changed the combination switch and all the tail lights and interior lights came on but now my headlights aren't working. I put the old switch back in, headlights work but no tail lights. So I just installed the new one back in and all lights work except headlights. I checked fuses and bulbs and there good. Any help on what it could be?