The Standard Ignition DS 173 SI Door Jamb Switch is engineered to activate interior lights and ensure proper door closure enhancing vehicle safety and convenience Designed for a wide range of vehicles including models from American Motors this switch features a 0 65 plunger and a 3 8 24 thread size facilitating straightforward installation Constructed with high grade materials it offers durability and reliable performance under various conditions The screw in mounting type ensures a secure fit while the bronze finish provides resistance to corrosion This switch is a direct fit replacement for several OE part numbers including 3662814 12338893 and 14014578 among others By replacing a malfunctioning door jamb switch with the DS 173 SI fleet operators can maintain proper lighting and door security thereby reducing potential safety hazards and operational disruptions