Okay I have a model S-64 wire feeder and have a couple questions on the wiring inside. This one has an interface board and tach board. First off on the diagram it shows PLG1 is supposed to connect to PC1 on the motor board. Problem is I have 2 PLG1's one has a purple stripe. Then it shows PLG2 goes to PC2 on the motor board. Problem is it says PLG2 also goes to RC54 on the Tach board. Currently we had PLG54 plugged into PC54. Looks like PLG54 comes from the interface board. We had PLG52 plugged into RC2 on the motor board. Plg52 comes from the Tach board and PLG2 was disconnected.

Any ideas?