Low voltage chandelier (Lite Source) quit working. Electrician said the transformer was not functioning. Ordered new transformer (Wang House model WH2101S), which came with no wiring instructions. The vendor has been less than helpful. My contractor cannot get it to work, he has not wired with a transformer before. Can anyone provide wiring instructions? Thanks.

What color wires do it have? This is a Chinese part and there is no set rule for wiring colors with these things.

Their site does not show an image for this model. http://www.wanghouse.com.tw/products_detail.php?show_open=N&cut=here&main_id=22&second_id=34&three_id=37&p_id=54&model_no=WH-2101S

Does it look like any of these? WANG HOUSE TECHNOLOGY (http://www.wanghouse.com.tw/products.php?show_open=N&cut=here&second_id=34&main_name=Downlight%20Transformers&second_name=Input:%20120V)

The black and white wires on the right go to the electric pos. and negative. The 2 red go to the lights together and the 2 white on the left also to the lights. If you have lots of little lights you can do a red and white to half of them and another red and white to the other half.

If this is for lowvoltage trac lighting, then the secondary will be thicker wire.

How I can asimble 12volts/dc for lights

how i can asimble 12volts/dc for lights
Maybe you can try asking this question so that we can all understand it?
Try and add some details as well.