If the light is on, but there is no connection, please search for "connecting to the lock" instead.At the bottom of the lock there's a button in the middle, which should give off a light, if you press it for a second or two.If there is no light in the lock, it's due to a lacking connection, and is usually caused by damp conditions and changing temperatures.In order to get the light back on, turn the lock upside down, find a hard object (like some wood, a rubber hammer, the sole of a shoe) and knock the bottom of the lock 8 to 10 times hard. This should jumpstart the light.If the lock is still completely dead, you can jumpstart it with a 9V battery, touching the two poles next to the button. Give it a couple of minutes to charge the battery.If the temperature is below 5 degrees celcius, you might have to heat the lock. You can do this either by:using your hands for about 5-8 minutesheating the locking bar with a lighter for about 90 seconds.