Ok well a little history on the car. When i first bought it whenever i used the heat or ac it never worked on 1 or 2 but 3 4 and 5 work no problem. Last night i put the heat on and it was on 3 and my headlights turned offI flipped the dial to off and they came back on. I tried putting it on 4 and the same thing happened. This time i tried turning to 5 and headlights came back on and heat was blowing out fine.
Wtf could be causing the headlights to turn off when i put it to 3 and 4?