Hi Iman,
Thanks for the suggestion. However these appliances have an external PLC Modem plugged into the rear of the appliance.
I took one apart and I can see the V+(red) data(yellow) and gnd(black). I simply have to pull some of the guts out to make room for a FET and opto isolator then I should be good to go.
But first I do need to look at the signals and verify the are usable. I do have the wiring diagram / schematic from the service manual.
John
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