I try to install the new radio, when I unplug it I make a mistake to touch the remote wire to the ground (of radio).I have the voltage meter, so I turned on the key and check the remote wire from the ignition; there is about 3.5 volt (it must have 12 Volt to order to turn on the radio). I checked all fusses were good. Do you know that beside the fuse, it's anything wrong with this? Thanks!