If there is a factory amp behind the factory radio, you can unplug it, and that should solve your problem.
John
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John
1992 Mustang LX 5.0-Powerdyne BD-11A, 3.73's, FRPP clutch, chrome Ponies, Mac headers, Aeromotive regulator, MSD 6A, MSD BTM, FRPP 42# injectors, Pro-Flow Air Optimizer, Trick Flow Track Heat intake, Edelbrock 75MM TB, AFM Power Pipe