[mike944]

The wire comes out of the harness that goes between the back timing belt cover, and the front of the water pump. Sometimes the wire gets caught between the valve cover and the distributor cap housing (the black painted timing gear cover) I believe the oil pressure sensor leads also connect to the same portion of the harness.

Find the water temperature sensor, under the water outlet. (the thing with the coolant bleed screw in it). the connector that hooks to the water temperature sensor connects to this part of the harness as well.