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1) The headlight doesn't work. The bulb looks good
2) There is a plug on the side of the quad that doesn't have any connection. What is the purpose of it? (marked 1 on the picture below) Also, there are two wires that are not connected (marked 2 on the picture below. Do they need to be connected?
I traced the wires from the plug (1) and it is the same cable as two unconnected wires (2).