need eec-iv wiring help

[Jon]

The 5 liter eec-iv harness I got from the boneyard was complete except
for the HEGO pigtails, they were cut off.  Can someone tell me how to
connect the three wires on the sensors to POWER GROUND, IGNITION/RUN,
and HEGO-L/R on the harness.  The wires on my sensor are white (two) and
black (one) and I measure about 4 ohms across the white wires so I
assumed they are for the heater and  the black wire is the signal but
this does not agree with the diagrams in Probst.. The three wires form
an isoseles triagle in the connector, and the white wires are at the
ends of the long sides. The black wire is at the intersection of the two
short sides.   TVR Jon