How does the ignition switch get power?
How does the ignition switch get power? The Ignition Switch gets Power from Battery, which the Connection to the Battery is on the Battery side of the Starter Solenoid / Relay. The ignition switch is the master switch that provides power for the vehicle's electrical accessories, computer, fuel and ignition systems. How do you test a 12 volt ignition switch? Touch the black lead on the voltmeter to the frame of the vehicle. The voltage readout on the voltmeter should read 12.6 volts. If it reads less than 12 volts, your battery is dead, and you need to replace it....