2002 Chevrolet Impala | Stereo Wiring Diagram 2002 Chevrolet Impala. March 31st, 2012 Posted in Chevrolet Impala. 2002 Chevrolet Impala Stereo Wiring Information. Radio Constant 12v+ Wire: Orange Radio Switched 12v+ Wire: Yellow The stereo wiring diagram listed above is provided “as is” without any kind of warranty. Use of the information above is at your own risk. 2002 Chevy Impala Fuse Box Diagram – Circuit Wiring Diagrams 2002 Chevy Impala Fuse Box Diagram. 2002 Chevy Impala Fuse Box Map. Fuse Panel Layout Diagram Parts: Instrument panel, main body wiring harness, junction block, IP connector.