2002 Honda Accord problem with aftermarket radio install?

Re: 2002 Honda Accord aftermarket car stereo installation Help Please! The fuse behind the brand new Sony radio keeps blowing immediately after turning ignition key. Ruled out the harness and the radio itself since both were returned. Tried disconnecting the battery during installation too. Pressed the reset button behind faceplate. Keep in mind that the radio fuse in the fuse box never blows only the radio fuse. Factory radio worked perfectly prior to install. Maybe has something to do with this model and year?

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