We will be showing the charging circuit diagram for the 1949 De Soto all models. All models of ’49 De Soto have these components for their charging system; solenoid, ammeter, generator, voltage regulator, and 6 volt battery. As for the connection, here are the run down; 6 volt battery connects to the solenoid, solenoid have two connections to starter and ammeter, and ammeter connected to voltage regulator, and then the voltage regulator have two connections to the generator. Study the schematic thoroughly before you perform any wiring work in your De Soto. Click on image to view it larger in a new tab.