Using your SubiSpeed USDM TR Style Sequential Tail Lights is a breeze. First, for installation, it usually takes less than 45 minutes. We've included all the wiring you need. Just follow the steps in our installation video where Kevin shows you how to install them on a 2015 WRX. Make sure to run a power wire from the trunk to the driver's side fuse box inside the cabin so that the sequential turn signals work correctly. When it comes to the turn signals, you can choose between the standard on/off lighting and the sequential mode. There's a switch in the wiring that allows you to change between the two easily. If you prefer, you can also use the brake light as a turn signal since the tail as turn module is compatible. As for maintenance, keep the lenses clean. You can use a mild automotive glass cleaner and a soft cloth to wipe them down. Avoid using abrasive materials that could scratch the lenses. If you have any issues, remember that these tail lights come with a 2 - year limited manufacturer warranty.