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The black lead with copper is the illumination lead which if you turn on the lights you will see light coming out the end....I am sure if you turn on the key one of those 3 remaining wires should be hot (12v+). If it is not you should check the fuse for the sunroof. The remaining two wires should be the open and close for the sunroof and should only be hot (12v+) with the switch in the up or down depressed position.
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