14-18 ZL1 Camaro Heated/Cooled Seat Upgrade: Wiring Question.

[BigTopGT]

I just picked up a set of 2022 ZL1 seats for my 2018 RCSB and I know the truck has to have the heated seat option so the BCM knows to trigger the heat signal in order to make it plug and play in any way. 

 

Since White Auto isn't currently modifying BCMs to turn that signal on, I'm trying to think outside the box in order to get the heat and cooling feature in the seats to work. 

 

What I don't know is how the actual on/off is triggered for the respective features works. (negative/positive switched relay?) 

 

I'm getting ready to install an Alpine ILX F511 head unit and they offer an accessory that adds "switch" options. 

 

I'm pretty sure the Alpine's KAC-001 (External Accessory Control Module) runs a negative switch relay system, so I'm wondering if we can simply bypass the BCM, and wire the heat/cool feature to a relay that activates the heat and (separately) the cooling system in the seats and control it with the head unit. 

 

That's not as desirable as being able to use the factory switches, but it'd be a great start towards making the seat functionality improved above simple forward/back/up/down/tilt

 

Thanks for looking!