Using your OLM Evolution Tail Lights is a breeze. Since they are plug - and - play units, you can easily install them on your 2015+ VA platform Subaru WRX or STI. Make sure your vehicle is turned off before installation. Once installed, you can choose your preferred turn signal mode. If you want the standard on/off mode, leave the switch as it is. To use the sequential turn signal, just flip the built - in switch. When it comes to the tail as turn feature, if you prefer using the brake light as a turn signal, you can skip the amber turn signals. As for maintenance, keep the tail lights clean by regularly wiping them with a soft, damp cloth. Avoid using abrasive materials that could scratch the surface. Check the load resistors periodically to ensure they are in good condition and not affected by condensation. If you notice any issues like hyperblinking or malfunctioning LEDs, refer to the included documentation or contact customer support.