Originally Posted by
wstefan21
Sorry for the delayed response. Finally got the new 0411 PCM and had time to mess with it.
My assumptions were correct. The 0411 can read the pressure sensor where the old one would not. This one also will stop responding to analog 12V ac signal when a/c type is set to serial. Analog also does NOT react to the low-pressure cycling switch at all.
The most notable thing, I did not notice it turning off even when the pressure went below 20psi (yes, I was low on refrigerant), so if you do not have a newer variable displacement compressor (mine is an old r4), you need to wire your old cycling switch inline your 12V enable signal with the high-pressure sensor.
Blows nice and cool now! Very happy with the results. And yes. I acknowledge that there were cheaper options of going about this, and this was probably just my OCD, but for those who want control of fan timing vs pressure, this is a great option! Hope this helps someone.