u/Ghostboy453

Hello, I just recently got a new set of headlights for my 2013 v6 Mustang because the old ones were breaking and stopped working. I finally got the last part I needed to put in the driver side headlight, a new ballast. I've put it in, and the headlight finally turns on, but now it won't turn off, I have to unplug the whole thing. Is it maybe because either the wire into the bulb or the 2 wires plugged into the new ballast aren't properly plugged in or something?