There should be a toggle switch or a fuse stat inside the transformer.
Why do my low voltage lights keep going out. Your voltage drops as you add lights and additional wire to each run so you will need to adjust your voltage as necessary. Bulbs may be loose or connected improperly. Transformers are usually connected to a receptacle outside the house.
Oh yes this is the age old low voltage lighting question Why are my lights dim Although there could be a number of reasons for this the primary and most common culprit is. My outdoor low voltage lighting is blinking onoff - cycles onoff every 2 seconds approximately - this is not an issue of the photo sensor picking up light from the installed lights. If you read the voltage on the transformer the output is 220 VAC.
I have burned up three dorbell button lights one eery 6 months for the past year and a half. When a lamp does go out it allows more voltage to flow to other lamps which usually means they are becoming over volted and will burn out quickly. If you do have power at your transformer and the lights still arent turning on there is likely a short causing the transformer to shut off.
Other times it can be from the incapability of using 220V on a driver thats meant for running 110V. After you install the cables consider making a detailed map of your light. Check to make sure the toggle switch.
My transformer keeps tripping its internal breaker when my lights come on. There are some cars with the auto day running lights and if you have this make it means you will buy more of them. The other works perfectly fine.
Could this be due to a brakage in one of the cables or do you think the downlights are too powerful for the lighting cercuit. The higher voltage caused by the burnt out bulb should cause the shunt to fuse together. Beside this why do 3 way light bulbs burn out so quickly.

