It’s a 7427 in a 95 truck. I’ve got the fans with the thermostatic switch installed and working well. Problems start when I connect the 12 volt wire from the A/C compressor to the relay. Don’t know if it’s back feeding or stealing power. If I would of found the e-fan hack before I installed I wouldn’t have used the thermostatic switch that came with the fans. As of now I wired a switch in the cab to send a ground to the relay for A/C request.
The e-fan hack stated that you can use all or part of code to do what is needed for your setup. I don’t understand what to change in the hex editor to send a ground for A/C request only. I hope someone here can help, I wired the AFR to the pcm to use for wideband tuning and was thinking I could do this.