Possible drift switch

So Iv got the rear diff out to pull some sheered bolts out of it and while it’s out Iv been reading up on the awd. I don’t know if it’s true but I read that the computer sends a signal to control the amount of power that goes to the rear wheels 0-5.85 volts. 0 being no power and 5.85 being 90%. Just out of curiosity would it be possible to wire up some kind of switch to send the 5.8 volts back on demand?