Using this OLM Light Tunnel Turn Signal Indicator is a breeze. First, make sure your vehicle has factory OEM or OE - style turn - signal housings. To install, unscrew the turn - signal housings on your car. Take off the plastic covers and carefully break off the black plastic piece that's there. Then, install the OLM indicator in its place. After that, put all the parts back together. As for maintenance, keep it clean. You can use a soft cloth to wipe it down regularly. When driving, check occasionally to make sure the indicator is working properly. And always follow local traffic laws when using your turn signals.