The 9-pin female auto connection, also known as the DB9 connector. It consists of 9 pins arranged in a d-shaped housing, 5 pins in the top row and 4 pins in the bottom row. This type of connector is used for a variety of applications, including serial communications, RS-232 interfaces, and industrial control systems. It is easy to recognize due to its unique shape and number of stitches. A loose connection can result in data transmission errors and even damage to the device. Overall, the 9-PIN male automotive connector is a reliable and versatile connector that has been used in a wide variety of industries for many years.