Using this Diode Dynamics Tail - to - Turn + Backup Module is a breeze. First, make sure you have a 2015 or later Subaru WRX or STi. Since it's a plug - and - play kit, simply connect it using the OEM plug - and - play tail light connectors. You don't need to do any wiring or remove your tail lights. If you plan to convert the old turn signal socket into a backup light, use the included wires, but remember to get new white LED bulbs. As for the flasher relay, if you already have an LED flasher relay, you can keep using it. When it comes to maintenance, just keep the module clean and dry. Avoid using non - Diode Dynamics products as they may lead to improper function. If you notice any issues like hyper - blinking, it's likely because you're not using the right bulbs or haven't connected it correctly. Check the connections and make sure you're using the recommended LED bulbs.