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Renew the factory alternator wiring harness on your 1979-2004 Mustang. Due to the plastic construction of this electrical connection, it is common for the tabs on the voltage regulator plug to deteriorate, causing them to break when removed from the alternator. Replace this plug and ensure a solid electrical connection on your Mustang restoration project with this direct replacement Voltage Regulator Plug for all 2G and 3G alternators.