I can't help but notice that I can very easily add some switched features to the car while I do this.

I saw that there is a VATS input. Is this just the "systems go" from the VATS module? Would I be able to tap into it and have my remote start send a 12V signal here bypassing the module (and chip setup I have on there now)?

The next toy I would like to add is a fan swich. I already have the grounded CTS version, but I would like both of them to come on. Can I just ground (or power) this wire so that the ECM thinks the AC is on and both fans turn on?

Please move this to electronics if need be... it's a bit of both question.

 

The VATS module outputs a specific signal that the ECM expects, it's not just a +12V in.

I don't think fooling the ECM is a good idea, maybe it does other stuff when it thinks the A/C is on. Just MHO though.

 

just cut the green wire on the fan relays and run them to ground to get them both on.