Headlights intermittently turning on and off

So my headlights (both) will turn on and off on their own. This happens in both the on and off position of my headlight switch. It is not effected by movement as it happens when not moving and even if the engine is off. I have already checked the contacts on the headlight switch and they are good. There isn’t a dedicated headlight relay or fuse in my vehicle it is controlled via the FCM (Front Control Module). I have already had a diagnostic done and the only thing they found was a short in the dome light. (Which has been there for a while before the problem began). Short of replacing the FCM I have no idea where to look next any help would be appreciated. Also all the interior lights as well as tail lights follow whatever the headlights do. (If I have the headlight switch in the off position, when it intermittently comes on the dash lights as if I had turned the headlights on.) I had the battery and alternator checked and they are 100% fine.