Look at the fabric or mylar material behing the protective grill on the front side. If bad you will see cracks or it will be expanded in size and look deformed. If normal, use an ohm meter to test across the wire terminals. You should have 4-8 ohms. If you have very high ohmage or no circuit at all, it is bad. Thanks
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Look at the fabric or mylar material behing the protective grill on the front side. If bad you will see cracks or it will be expanded in size and look deformed. If normal, use an ohm meter to test across the wire terminals. You should have 4-8 ohms. If you have very high ohmage or no circuit at all, it is bad. Thanks