When you install a canbus led brought from amazon.com, ebay.com, ailexpress or some led car light maker internet site such as FIAA, AOZOOM, LEDOAUTO. You should see to it the vehicle engine as well as all the car lights are both turned off. After verifying this vital step, now you can begin to install the led canbus light. The auto needs to always be switched off as well as lock it to reset the on-board computer system. Mounting the LED bulbs, then, maintain the engine off and also activate the light to see whether the LED light bulb illuminate. If the LED light bulbs illuminate, then begin the engine to check whether there's a mistake message on the dashboard or not. If there is no any kind of mistake message, they installed well. Or else, you need to shut off the engine. securing the vehicle as well as wait concerning 10 secs, and after that start the car and examine again. Occasionally, the control panel needs to take two times to reset the light bulb, so you could turn the auto on and off for the 3rd time. If the led canbus bulbs do not brighten, perhaps you must transform the light as well as the auto off. Then transform the light bulb in 180 degrees and also repeat the checking actions..