Hi how do I get a toner to find a shorted mc cable buried in sheetrock, Do I have to remove the cable connector from the panel to seperate the shield?
I have one circuit to lights that works and the black lead is shorted to the white and green ground, Most of the baseboard plugs have been rewired with either romex or mc.

I want to get a better idea on location before I start opening sheetrock or lath and plaster upstairs.

Thanks Chris