Hey guys, brand new to the site. I have an 01 IS300, recently put headers on, but on of my o2 sensor connectors on the harness was pulled out. Im trying to find out the configuration of the wiring to the o2 sensor connector, closest to the firewall. It has 4 wires "Black, Black/red, brown, and Tan" wires, but no clue what order they go in top to bottom. please help
Thanks