Hazard lights keep flashing?

A while back I noticed that the hazard lights on my van were flashing on their own. After pressing the hazard button, they still would not shut off. So, I disconnected the battery for about 15 minutes and reconnected then it stopped.

Now the lights continuously flash even when driving and it takes up to a day to finally turn off. They will sometimes start flashing very fast then slow then as if they were shorting out. I notice if press the actual hazard button it flashes as normal but won't turn off. There were also no codes showing up when I got the car scanned.