The black wire is the chassis ground and should be hooked to an unpainted metal surface. The yellow wire should be hooked to a constant 12 volt line, one that is not controlled by the ignition switch.
I got a Pioneer DEH-P4000UB cd player with usb input for my car. I purchased a 16GB Scandisk Cruzer...
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I got a Pioneer DEH-P4000UB cd player with usb input for my car. I purchased a 16GB Scandisk Cruzer 2.0 flash drive (like taran_2005), but it will not recognize the usb. It gives me "Error 23" which the manual claims is a CD error. I formatted the usb as FAT32, copied the music back onto it and it still is not recognized. What now?