The Starter Motor is an important component in a truck's electrical system. It is responsible for turning the engine over by using an electric motor to spin the flywheel. When the key is turned in the ignition, it sends an electrical signal to the starter solenoid, which then engages with the starter motor and begins to turn the engine. The starter motor can produce a significant amount of torque to get the engine started quickly. A faulty starter motor can prevent a truck from starting altogether, so it is important to ensure that it is functioning properly.