I have a 2004 Ford Expedition Eddie Bauer Edition 5.4L. When I have to use the hazard lights, I can turn them on but can not turn them off. When I attempt to turn off the flashers I push the button down however the button will not stay down. It just pops back up. Can I replace the switch to fix this or do I need to replace the whole turn signal/wiper arm to fix this issue. Any help with this matter is greatly appreciated.