Sorry for the confusion...AHC Tests were done with wheels on ground. I just saw the HI LED functioning by accident when I had the wheels off ground and I turned the key, can't remember why.If the brake is on, AHC is supposed to not move heights. To move heights, put it in park, foot off brake. Hand brake should be ok.
If the car isn't totally on the ground, ahc isn't going to work and you should not cycle heights. If you're doing any other work on it and a wheel is in the air, wait until you've got it all back on the ground to troubleshoot ahc.