Our comprehensive 1989 Pontiac Firebird radio wiring diagram shows all the radio wire harness colors, speaker wire colors, and speaker sizes. Use this head unit pinout guide to help with your car stereo installation or to troubleshoot radio wiring issues in your 1989 Pontiac Firebird.. Wirediagram.com makes no representation or warranty with respect to the above information including its accuracy, completeness, or its freedom from third parties' proprietary rights. Wirediagram.com disclaims all liability or responsibility for errors or omissions therein or any decision made by the recipient in reliance thereon. The installer must verify any circuitry with the proper test.
Find out how to access AutoZone's Wiring Diagrams Repair Guide for GM Firebird 1982-1992 . AutoZone's Repair Guides tell you what you need to know to do the job right.. 1989 Pontiac Firebird Speaker Sizes Audio Front Speakers Size: 4″ x 6″ Speakers Audio Rear Speakers Size: 6″ x 9″ Speakers The following information is currently not available: Stereo Amp Trigger Wire *If you know any of the above or any other missing information please use the comment box below to notify us.