No, do not ground the yellow N/S wire, it goes straight out of the C100 connector to the switch input. The output is a purple wire which goes to pin B9 on the relay which goes across to pin A7 which goes to the ground distibution. The pin A9 goes to a constant 12 volts and the other contact side pin B7 goes to the purple solenoid wire. Fip the relay upside down to see the pin locations. Hope this is what you were looking for.



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