In the living/dining area (of a home I just purchased in a new city/state where I don't yet know an electrician) there are 5 outlets with the lower-half switched. I was attempting to eliminate switching of the dining area receptacles, and in one box fed with two (2) 3-wire romex plus ground feeds I removed the red wire to the lower hot side of the receptacle with a broken tab between the upper and lower outlets. I jumpered the upper and lower outlets effectively making both hot, but now the switch does not control other half receptacles.
Electrical – How to correct wiring of a half switched receptacle
electricalwiring
Best Answer
You need to join any red wires from the boxes you modified such that the removed red ties into the "other" removed red (or whatever color was used) so that the circuit is carried to the next location.
So if a red wired screw (or so be it, backstab) had another wire on it, or with it, they need to be capped together in the back of the box.