Holley Terminator X Air Conditioning Tech Help 86-93 Mustang

Anderson Ford Motorsport Tech

Holley Terminator X (550-937F) Air Conditioning wire write up using factory wiring for 86-93 Mustang.

The following tech article refers to the Holley Terminator X and X Max for Fox Body Mustang air conditioning systems that are performed at the Anderson Ford Motorsport Installation Facility. The following information covers general steps and procedures done with the factory wiring that is incorporated into the Holley system. If your vehicle was not equipped with air conditioning from the factory some of these steps may be different. Wiring colors confirmed for 91-93 Fox Mustang.

One thing we’ve noticed with the Holley Terminator X system for Fox Body Mustangs is that with all the new wiring harnesses it can scare the average consumer who may not be too tech savvy thinking it’s a monumental task to perform. The reality is that the Holley system is about 90% plug and play. The 10% is what seems to be intimidating. 1- The factory wiring to gain functionality of the gauge cluster and 2- Factory air conditioning seem to be the main culprits of this. We are going to start with the assumption you have all of your factory engine and EEC harness removed from the vehicle and show how straight forward the process is for installing the air conditioning wiring back into the car.