A system, comprising: a starter circuit configured to provide power to an electric machine to drive a load, the starter circuit including: a voltage input provided to the starter circuit via an electrical bus; a common switch electrically connected to the voltage input via the electrical bus; an inverter electrically connected between the starter circuit and the electric machine; a solenoid circuit electrically connected to the voltage input via the common switch, wherein: the solenoid circuit is configured to provide power to the electric machine via operation of a solenoid switch configured to establish an electrical connection between the inverter and the electric machine, wherein the solenoid circuit comprises a solenoid built-in-test, BIT, circuit, the solenoid BIT circuit configured to determine a state of the solenoid switch; and a braking circuit electrically connected to the voltage input via the common switch, wherein: the braking circuit is configured to prevent power generated by the electric machine from reaching the electrical bus; and the braking circuit comprises a braking built-in-test, BIT, circuit, the braking BIT circuit configured to determine a state of a brake switch within the braking circuit. a starter circuit configured to provide power to an electric machine to drive a load, the starter circuit including: a voltage input provided to the starter circuit via an electrical bus; a common switch electrically connected to the voltage input via the electrical bus; an inverter electrically connected between the starter circuit and the electric machine; a solenoid circuit electrically connected to the voltage input via the common switch, wherein: the solenoid circuit is configured to provide power to the electric machine via operation of a solenoid switch configured to establish an electrical connection between the inverter and the electric machine, wherein the solenoid circuit comprises a solenoid built-in-test, BIT, circuit, the solenoid BIT circuit configured to determine a state of the solenoid switch; and a braking circuit electrically connected to the voltage input via the common switch, wherein: a voltage input provided to the starter circuit via an electrical bus; a common switch electrically connected to the voltage input via the electrical bus; an inverter electrically connected between the starter circuit and the electric machine; a solenoid circuit electrically connected to the voltage input via the common switch, wherein: the solenoid circuit is configured to provide power to the electric machine via operation of a solenoid switch configured to establish an electrical connection between the inverter and the electric machine, wherein the solenoid circuit comprises a solenoid built-in-test, BIT, circuit, the solenoid BIT circuit configured to determine a state of the solenoid switch; and a braking circuit electrically connected to the voltage input via the common switch, wherein: the solenoid circuit is configured to provide power to the electric machine via operation of a solenoid switch configured to establish an electrical connection between the inverter and the electric machine, wherein the solenoid circuit comprises a solenoid built-in-test, BIT, circuit, the solenoid BIT circuit configured to determine a state of the solenoid switch; and a braking circuit electrically connected to the voltage input via the common switch, wherein: the braking circuit is configured to prevent power generated by the electric machine from reaching the electrical bus; and the braking circuit comprises a braking built-in-test, BIT, circuit, the braking BIT circuit configured to determine a state of a brake switch within the braking circuit.