2007 Pontiac G6 Wipers won't turn off.?

Once every couple of months when I start my engine my windshield wipers will turn on and they won't stop until i turn my head lights off. And when i turn my headlights on or sometimes my turning signal my windshield wipers will start up again. It's very annoying. For like a half year my car will be fine then one day it just decides to start up again and will do it for a couple days or weeks. Anyone know what could be the problem? I've already had the wires checked and the computer module replaced it will work perfect and then months later it will act up again :(
 
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