O2 sensor wiring (downstream) took a hit when Trans was replaced.

Downstream o2 sensor connectors were cut off and wires twisted together when Trans was replaced. Need to purchase o2 sensor Denso probably and need to know how to wire it in. Can't use connector ends on sensor or harness for reference cuz they be gone. Do they sell connector end for harness side?

 

Wire colors don’t match?

 

Is your truck V8 or V6? I copied the link for the oxygen sensor connector for a V8 from RockAuto for you. Modify to V6 if you need that instead.

https://www.rockauto.com/en/catalog...l-connector,oxygen+(o2)+sensor+connector,2604

 

I’d cut another harness from another truck on scrapyard.

Check the Megathread for a link to the electrical wiring diagrams (EWD) for colors if needed, but if you get from another truck with matching engine and cab and roughly year, I would expect a match (different cab, different engine, different year … not so much)

Use the parts lookup tool @ www.densoautoparts.com to find the correct part for your truck, since different cabs/years/engine/drivetrain use different part numbers.

 

There’s a special place in hell for idiots who cut OEM wiring harnesses and connectors. They should be banished to diving PT Cruisers.