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The turntable wires are based on the stereo configuration. Each channel has live wire and ground.
If you have electronics measuring instrument, you can perform simple resistance measurement for the system. Two sets of wires are for ground: Most likely Blue and Green are the ground wires for each channel. So, If you measure resistance between the green and blue wires, it should be the zero. If you measure resistance between common ground and green or blue, it should be zero.
Left channel is white and right channel is red.
Here is the list of wires:-
Left + white wireLeft Ground - blue wireRight + red wireRight Ground- green wire
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