Fan issue with AC trinary switch

[A1971Blazer]

'67 C10 with '02 LS1
I'm running the Entropy LS swap radiator with dual fans.

Fan 1 is wired to the PCM only, it triggers the relay at 195º, it works perfectly.
Fan 2 is also wired to the PCM to trigger at 205º and it's also wired to the trinary switch and connected to the same trigger (ground).

The fan will come on via the trinary switch or the PCM or both ( I assume)
I'm getting a code P0481 (fan 2) when I have the AC on and the PCM triggers the fan 2 relay. I did find a loose connector in my load center for the fan 2 relay but I fixed that.

I'm wondering if the trinary switch and the PCM fan trigger being wired together is causing the issue, and what is the best/easiest way to correct it?

[A1971Blazer]

My go-to source for tons of information....good old YouTube, it's better than 4 years of college...
I quickly found an easy way to wire the fans and separate the PCM trigger and the trinary switch trigger.
I had the idea I just wasn't sure of the exact connections.
It's similar to the way I wired the high/low beam headlight relays.

[v30crewcab]

computers don't like additional stuff. you need to wire it thru a relay were its either or, not wired together.

[A1971Blazer]

Originally Posted by v30crewcab

computers don't like additional stuff. you need to wire it thru a relay were its either or, not wired together.

thanks....see post#2

[v30crewcab]

cool, thats how I was thinking just wasn't sure how to explain it!