Click on the attached links ...you should find the wiring info you need.
1990 legend 4
Acura Stereo 1990
1990 Cobalt Blue Pearl Sedan LS
w/JSP-92104 spoiler, Bose Stereo w/single cd player, plus FM Honda 6-disc changer in glove box. Automatic, 268,000 kms, original drivetrain, stock size tires. 1989 Ebony Black Metallic Sedan L
Auto. Integra AM-FM cassette head unit, and Honda 6-disc changer in glove box. Stock size tires. Original engine threw a connecting rod mid-Feb, 2007 at 380,000 kms. JDM swap-out July 1, 2008. Car still off the road pending serious body work on rear quarter panels.