I have a switched outlet underneath my sink, probably from a garbage disposal. It's in a 2 gang box with two receptacles, one switched, one not. There is a switch on the wall by the sink to operate the outlet, also in a 2 gang box (sitting alongside another duplex receptacle, which I already replaced with a new one w/ USB.)
I don't utilize the switched outlet underneath the sink, and am replacing the switch with another duplex receptacle (another usb upgrade).
There is one live supply cable coming into the switch box (verified by voltmeter), and two dead cables going out (one to the switched outlet, and another going to wherever else).
I have the supply line going into the left (original) receptacle, a set of jumpers going from that receptacle to the new one, and then the new one is pigtailed to the two cables going out.
For some reason, the previously switched outlet under the sink no longer gets power. Also, a receptacle tester on the new receptacle (the one that replaced the switch) shows "reversed hot/neutral", but the voltmeter shows no load on the neutral wire and 120 on the hot, indicating a possible ground issue? The receptacle that was already there tests normal.
Everything seems to be wired correctly in the box with the new receptacle, what else can I do to troubleshoot?