Confused… an electric switch is supposed to be simple but first time I see the following : Carling switch, single pole double throw with indicator light. No off position. 24 volt system. Load disconnected from the switch. With the ground wire connected for the indicator light to work: Switch OFF, indicator light OFF, I get 0 volt on pin A and 24 volt on pin B Switch ON, indicator light ON: I get 12 volts on pin A and 0 volt on pin B with the ground wire off, voltage reads 24 volts on pin A Why does the voltage drop by half when the indicator light ground is connected? Apparently it s been like that for years and at some point someone had moved the wire going to the bilge pump to pin B. It worked but with the switch off…
