Hello Stuart,
If you mean the plug and you are in the UK it should be, 2 red wires joined together, with the plug apart and as you are looking down the open pins facing left, red wires on bottom pin, 2 black wires on seperate pins, if the machine runs on or if the light goes out when you sew change the black wires over.
Ken
drivewithken
July 2009
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