What is a door jamb and why is it important to an automobile? The door jamb is the vertical portion of the door frame where the door is attached. To secure the door, hinges, deadbolt plates, and even the deadbolt itself are attached to the door jamb. But aside from these components, a switch can also be installed to the door jamb. Automotive door jamb switch turns on the light as you open the vehicle's door and shuts it off as you close the door. This switch is very much like the button that switches the light on and off inside your refrigerator. This switch is of great help especially if you want to look for something or to access anything in the vehicle's passenger cabin and you're in a hurry. With the door jamb switch, you no longer need to spend time and effort just to find the switch of your ride's interior lights. You can also have peace of mind that even if you forgot to manually press the switch, the light will automatically shut off as you close the door. Do you observe that your ride's interior lights stay on even if no one's inside the vehicle and the doors are closed? That could be because of a malfunctioning door jamb switch. Fortunately, Car Stuff has the high-quality direct OE door jamb switch replacement that you need for your ride and we offer them at budget-friendly prices! Purchase now and we'll deliver it to your place fast!