I drive a 2004 Mach 1 and yesterday both my trac off and abs lights came on. They will stay on from when I start the car til I turn it off. Other times I will start the car and they will never turn on. If possible I don't want to pay 115 to have it diagnosed. Any ideas? I know the sensors and modules can go bad just hoping I can get a basic idea of which it may be from the forums.