What is this connection and what is it supposed to do?

[1990 Pioneer 4x4]

What is this and what is it supposed to do?

 

[cherokee]

sort of looks like a broken knock sensor and the o2 sensor plug... that's actually normally in the area of the driver's side motor mount.

[Oizarod115]

sort of looks like a broken knock sensor and the o2 sensor plug... that's actually normally in the area of the driver's side motor mount.

:clapping:

[1990 Pioneer 4x4]

sort of looks like a broken knock sensor and the o2 sensor plug... that's actually normally in the area of the driver's side motor mount.

 

thanks. but what do they do and do i really need them, as my truck seems to run fine. :huh???:

[maddzz1]

Those are for the interior diff cover light

 

 

I wouldnt think the truck would run to well w/out the O2 sensor hooked up. Is your O2 sensor plugged in?

[jpdocdave]

mine would not run more than a few minutes without the oxygen sensor, and it looks like the o2 sensor plug to me also.

[1990 Pioneer 4x4]

I wouldnt think the truck would run to well w/out the O2 sensor hooked up. Is your O2 sensor plugged in?

 

Where would it "hook up" at? i ran it for over an hour today and didn't notice anything wrong.

[Oizarod115]

I wouldnt think the truck would run to well w/out the O2 sensor hooked up. Is your O2 sensor plugged in?

 

Where would it "hook up" at? i ran it for over an hour today and didn't notice anything wrong.

it will default to full rich, and will run... could possibly overheat your catylitic converter but no other damage can be caused really, poor fuel mileage too.

 

follow the exhaust from the engine there ought to be a sensor just above the joint in the exhaust, it will have a pigtail with a plug on it that will join to your mystery plug.

 

the other one is half of a broken knock sensor which will be located on the drivers side of the block up a few inches from the pan. somewhere between #2 and #4 cylinders