Z axis trouble shooting

I have a 3 XL and when I try to move the Z axis I get “busy” popping up on the screen. Then I tried again and got a message that GRBL was unable to find the limit switch.
When I tested the limit switches, the light does not come on for Z. I checked the connections and they all look good. What else might be the issue? Thanks!

If the homing switch doesn’t work when tested, either the switch, the wiring, or the controller is bad — if you don’t see anything obvious to address, contact us at support@carbide3d.com and we will do our best to assist.

Thank you. I tried that with no luck so I will contact the support address. Appreciate it.

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