What is the white wire on my Smartphone Controlled Interior Box?

The white wire on the Smartphone Controlled Interior Box is for the courtesy feature. The white wire would connect to the dome light or door pin trigger of the vehicle. Whenever the car door is opened the courtesy lights will turn on your interior lights to a solid white.

For more information please refer to page 3 of our installation guide. 

https://www.ledunderbody.com/content/Instructions/Smartphone-Control-Interior/4/index.html