CopaceticAF
Newbie
Running into code 13 on my 89 k2500 which clearly the o2 sensor isn't connected. I'm trying to track down where it plugs into I've looked everywhere and can't seem to find it. I have connector that is already connected which looks like it should be where the o2 sensor connects but if I unplug what's already plugged in and plug in the o2 sensor the truck doesn't start so I'm sure it's not the right connector. I got this truck as a project and am unfamiliar with a lot of the wirings. I know the 89 has the single wire o2 but for some reason there's also a dangling 3 prong connector near by that is unplugged as well with no clue what it's for. I attached some pics of what all I'm referring to. Any help is appreciated.