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Electro-magnetic fields like lightning and other surges can erase the default programing of security systems. Installing a new battery or having a problem while jump starting a vehicle can have the same result. Only dealers and specialists have the equipment to reprogram these systems and they can be pricey... Check the fuse first. if you are lucky this is where the problem is... After market radios have a fusible link and should be checked also. Good Luck!

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17y ago

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