i searched high and low got a quick question on the 2 black wires. on my boom slang harness it says to connect the orange on the sub harness to the orange/black on the o2 sensor and the yellow to the yellow/black on the sensor. now heres the problem it has 2 blacks. from what ive read it doesn't matter witch goes where but i just want to be positive.

 

forgot to mention that the yellow is the switched +12v source and the other is the control

 

it doesn't matter which is which.
the current flow through the resistive element is not directional.

 

thanks for the info breddren.