AC Technical Diagrams | Original Air Group Click here to view technical diagram. 1970-81 Firebird/Camaro/Trans-Am Use these diagrams with caution and at your own risk as we are not responsible for negligence as a result of use. 1972-81 Pontiac V8 (301/350/400/455) Compressor Mounting Click here to view technical diagram. 1977-79 Firebird/Trans-Am 403 V8 A6 Air Conditioning Compressor Basics of Bus Air Conditioning Systems – Trans Air Trans Air Manufacturing provides an easy to learn guide on the basics of bus air conditioning systems. Learn how our reliable systems can help you today. WIRING DIAGRAMS Repair Guide - AutoZone The following wiring diagrams are provided to help troubleshoot electrical problems and as a an additional source to help understand the complex wiring utilized by these vehicles. No attempt has been made to illustrate most components as they physically appear, instead, representations are used to simplify the diagram.