My son's passenger upstream o2 sensor electrical connector melted completely. I replaced the o2 sensor but I have wiring questions. I know the two whites are signal grey is ground and the black is power. But on the main wiring harness the wires are 2 red and 2 grey. I used my meter and found ground which was grey. The other grey had 1vdc while running and the two reds have 12vdc. Any leads or information you have is greatly appreciated

2004 f150 5.4 3v 4wd

 

Here ya go.

 

I'm sorry but I don't understand what I'm seeing.

 

General pic of wiring

New replacement plug
First pic is replacement connector second pic is general 02 sensor

 

Maybe look at the drivers side.

 

hey man did u ever figure it out I'm having same problem the connector on bank 1 sen 1 melted an the wires came out so I go another connector but colors are not same

 

just curious if you ever figured out how to wire yp the connector with the mismatched color wires? I jave the exact connector the guy posted from oreillys but the wires dont match my 04 f150 wires from computer. Please help if something worked for you.