Geeetech

so I have a geeetech a10 t same as the a10 just more colours

I just put a BL touch on it and im getting it ready to print.

BUT two issues one the z axis stop switch is always lighted now but doesn't seem to work

and two once i set it to auto home it does zx and y axis fine but once it goes to z it hits the heated bed and begins to grind.

Any ideas how whats going on ..thanks..Tweakbox Appvalley https://vlc.onl

Hello, it may be a wiring error. Please pay attention to the wiring of 3dtouch, and whether the 3pin and 2pin pins are correctly connected in place.
You can refer to the following video to install:
https://www.youtube.com/watch?v=IaHzsd4DgeU