Hello,
I?m new to this forum. I?m from Belgium and LS swapped a 1981 G20 chevy van.
ECU: 2001 GMC Yukon 1500 5.3 GM_P01
I installed a Sanden SD5H09 A/C compressor and wired it like this:
aangepast schema.jpg
So you have 12V through the ac low pressure switch ( as soon I set the lever on the dash on A/C ) feeding de relay ( red circle ) and this signal goes also to pin 17 of the ecu ( ac request signal ).
Pin 43 ( yellow circle ) is also connected to the relay.
Because my 1981 Van doesn?t had a pressure sensor, I installed a 20915 sensor on the A/C system and wired it to the ECU ( pin 45, 57 and 14 ).
The ac is working WHEN I disconnect the wire from pin 43 ( yellow circle ) and put ground to pin 86 from the relays. The AC is controlled by the AC low pressure sensor.
Now, what I want to do is
1. that the ECU can control the AC. This will happens by connecting the pin 43 to pin 68 from the relay. The ECU has to disable the AC when the engine RPM Is going above 5000 rpm.
2. The ECU controls the fan. So when the AC is on, the electric fans will also go on.
Can anyone tell me if my schematic is the way to go? And where in hp tuners I can set the fan?s to go on when the ac is on. And where the ecu can control the ac.
My tuner and I have tried a bunch of settings but we cannot find how to set the fan on and controlling the ac.
Any help is welcome, thanks!!!