There are to many versions of this machine to find a wiring diagram. With the serial number you should be able to get it from True, But what is wrong with the one that is on or in the machine. US law requires it to be part of all equipment, so look around. Sometimes glued to the back but often inside the compressor compartment or compressor starting control. Coolers are very simple wiring, and one can easily follow the routeing. The odd ones are the electronic controls or freezers.
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What is it your having a problem with?.