This high-quality Starter Motor Solenoid Switch, with OEM numbers 0001524010 and 665 - 1855, is specially designed for trucks. It serves as a crucial part of the truck's starting system, controlling the on - off of the circuit between the starter and the battery. When the ignition key is turned, it guides the high current from the battery to the starter, enabling the starter to run and drive the engine crankshaft to rotate for engine starting. Made of premium electromagnetic coils, contacts, and shell materials, it can withstand high current and voltage, ensuring reliable performance in harsh conditions like high/low temperatures and vibrations. With precise manufacturing adhering to OEM standards, it offers a perfect fit and long service life for trucks.