Home built 1975, South Florida.
Adjacent to my kitchen sink is a combo switch controlling a non-GFCI receptacle below the sink for the garbage disposal. Next to it (same box) is another non-GFCI receptacle. Connected to this one receptacle (spliced together, not in sequence) are 3 more receptacles for the microwave, dishwasher & coffee maker. The incoming wires are a 14/2 on one breaker and a single 14 (red) on another breaker. There used to be a fan in the next room converted to a simple light. I believe the red wire is the secondary hot that was once used for the fan. The outgoing wire to the disposal outlet is a 14/2.
Obviously, I would prefer to have GFCI next to my sink. The 3 outlets coming off one is clearly not the best set-up, but I have to work with what I have. :/ I have managed to change the outlet and all 4 outlets do test/trip correctly.
However, that leaves me stumped trying to install a single pole switch for the disposal receptacle below the sink. I have only 1 red line in and no neutral.
Is it possible? If not, do I need to splice a neutral to the neutral from the light in the next room & run it over?
Thank you for your help!