a power module is connected to the starter , alternator , and battery for an internal combustion engine . the power module includes one or more capacitors and delay timer . when the ignition switch closes , the battery of the starting system provides current to the starter motor , causing the starter solenoid to close the starter contacts , and bring a starter pinion gear into engagement with a flywheel ring gear . the delay timer does not allow the capacitor to immediately deliver current to the starter motor , but implements a short delay before the capacitor &# 39 ; s current is released to the starter motor . this short delay increases the chance for full engagement between the starter pinion and the flywheel ring gear , thereby reducing the likelihood of milling when the starter motor provides torque to the starter pinion .