Check the wires of the new harness for continuity. Never assume the new part cannot be the problem. If the new harness is good, it's either the camera or between the screen or battery and the new harness.
There is a universal locking lug nut socket. The lug nut will have to be replaced after using it.
https://www.amazon.com/THINKWORK-Extractor-Stripped-Removing-Rounded-Off/dp/B09BVDXQN3/ref=sr_1_5?sr=8-5