motor install

[comancheman]

hey guys, i just put a used motor i purchased I'm my mj. When i took the original motor out i marked everything so i new where it would go except for one connector, its on the same end of the harness as the coolant temp sensor and knock sensor its a three wire connector any ideas on where she goes? i can't find the other end.

 

thanks alot,

Tim

[Pete M]

Is it clean inside the plug or dirty? There are various plugs on MJs that don't really have a purpose on our trucks, but are still there because we share harnesses with XJs.

[aemsee]

what is the size and shape of the connector, and what year is your truck?

[Eagle]

Is your truck a 5-speed? If so, there are a few connectors (including at least one 3-terminal one) that relate to the auto trans and aren't used on the 5-speed trucks.

[comancheman]

its a 1990 with the aw-4 the plug looks clean I'm pretty sure it was used before

its a black plug with a green seal it connects three wires

[4play]

Sounds like a plug I unhooked when I was removing the fuel rail for some injector cleaning / o-ring replacment. IIRC, there were 2, one for 2 wires, one for 3 wires; both near the firewall, running across the motor. Sorry I can't be more helpful. :dunce:

[Xacto]

The manual shows three plugs at the end of the harness that runs across the fuel rail: coolant temp, knock sensor and a three wire oxygen sensor connector. I can post the wiring diagram for that area if you need it.

[comancheman]

Thanks for the help guys. Xacto u got it, the reason theres no connector is because theres no o2 sensor on the truck right now, :oops: what an idiot