Classic Auto Air’s New Smart Series A/C Kits are easier than ever to install. This Smart Series A/C Kit has Simplified Wiring with plug n play connections that allow you to be confident in doing the installation yourself. Classic Auto Air has taken out all the guesswork on wiring. The Smart ECU “Brain” of the a/c kit is clearly labeled and flashing LED lights to let you know what is going on every step of the way during installation. Only three cables plug into the ECU. Power, Servo, and Controls; that’s it.