Oxygen Sensor on 1990 Ford F-150

Where do the wires from the oxygen sensor go to?

Asked by for the 1990 Ford F-150
tothe wiring harness to the module
3 answers
I think it is also wired to the exsust
They go to the Engine Computer

here is an article on Oxygen Sensors and what they do

http://repairpal.com/OBD-Code-P0130-and-P0136