Yea Greg got me too although I thought that was very uncharacteristic.
So. I wired it all up, fired it up, punched the offroad mode button, turned the locker on, flipped aux 4 AND..... everything turned back off. (Locker and off road mode). After that I did a solid powerbrake to make sure the TCS was indeed off, which it was.
So then I shut Aux 4 off and repowered the system. I held down the advancetrac button until it flashed, like I have 1000 times, set my foot on the brake and pinned it. Giant smoke show. WTF. Why will this work now and never before? Beats the shit out of me. Maybe after a certain mileage? Baffling.
So all in all, the abs fuse relay mod kind of works, but you lose the factory switching of the rear locker and off road mode.