What is this plug for?

Geos7812

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Aug 26, 2022
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Evergreen, CO
I just bought this YJ, and noticed that this plug is not plugged in anywhere. Can anyone help me identify what it is and where it is supposed to go?

27147F85-9EA7-4C86-B9B8-E3DCA69CDFBF.jpeg
 
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jpjeep26uk

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The plot thickens! I don't have ac either so maybe that's correct and it stays taped up. I've got a temp sensor on the front of my block with nothing attached to it so I assumed it might be this cable. Now I wonder why there is a temp sensor with nothing plugged in haha.
 
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Geos7812

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Aug 26, 2022
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Evergreen, CO
The plot thickens! I don't have ac either so maybe that's correct and it stays taped up. I've got a temp sensor on the front of my block with nothing attached to it so I assumed it might be this cable. Now I wonder why there is a temp sensor with nothing plugged in haha.
My temp sensor works without that. Does yours? I would assume not but curious.
 

jpjeep26uk

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My temp sensor works without that. Does yours? I would assume not but curious.
Well I'm quite new to Jeeps so I can say that the temp gauge on the dash works fine 😂 I guess cos it's wired to the little sensor at the back of the block not this front one. Just seems pretty odd to have it there sitting with an open socket and not doing anything. Maybe I'm overthinking it 😂
 
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Geos7812

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Well I'm quite new to Jeeps so I can say that the temp gauge on the dash works fine 😂 I guess cos it's wired to the little sensor at the back of the block not this front one. Just seems pretty odd to have it there sitting with an open socket and not doing anything. Maybe I'm overthinking it 😂
100% agree! Someone on another forum said, “that’s how the wiring harness is.”
 

jpjeep26uk

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Haha, classic Jeep humour. No worries, I took it to a guy with a bunch of wrecked Jeeps near me and he said it's there because some PO has replaced the block it's connected to with a newer version than the 1988 original and it's prebored for that newer sensor. The PO bought the sensor and filled the hole more than likely. So its a dead sensor and correctly so. The rear one is the 'real' one for a 1988. All good! I shall ignore it and go back to my cursed backfire! Starting with a new fuel filter which looks like it came off the titanic complete with barnacles.
 
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Geos7812

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Aug 26, 2022
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Evergreen, CO
Haha, classic Jeep humour. No worries, I took it to a guy with a bunch of wrecked Jeeps near me and he said it's there because some PO has replaced the block it's connected to with a newer version than the 1988 original and it's prebored for that newer sensor. The PO bought the sensor and filled the hole more than likely. So its a dead sensor and correctly so. The rear one is the 'real' one for a 1988. All good! I shall ignore it and go back to my cursed backfire! Starting with a new fuel filter which looks like it came off the titanic complete with barnacles.
Lol!
 

olefart101

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Nov 21, 2020
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Casper,Wyoming
I believe it is for the rear oil pressure switch below the ground stud rear of distributor on engine block.. mine has been shorted out and melted the plastic.ive been looking for a replacement on my 88 4.2
 

jpjeep26uk

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Cool, I'll have a look and see if there is a socket. Thanks. Learning something every day with this forum.
 

T-Rex Jeepster

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Middle Tennessee
The plot thickens! I don't have ac either so maybe that's correct and it stays taped up. I've got a temp sensor on the front of my block with nothing attached to it so I assumed it might be this cable. Now I wonder why there is a temp sensor with nothing plugged in haha.

My 2.5 and 4.0 have two temp sensors, And both were/are plugged up.....I think the ECU monitors the larger one and the smaller one in the back is for the gauge....
 
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jpjeep26uk

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Will I get away with cutting it off and sealing off the end to tidy it up in the bay? or better off leaving it and tuck it away somewhere safe and waterproof?
 

machoheadgames

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Agreed with Superbird, a lot of people become obsessed with deleting things because they don't like the dangling plug but after a while, I don't see the point. Could sell the Jeep to the next guy and he wants to add factory controlled AC....now he's hosed.

You can delete it as the wiring serves no purpose, but I'd say just leave it.
 

jpjeep26uk

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Nov 12, 2022
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UK
Agreed with Superbird, a lot of people become obsessed with deleting things because they don't like the dangling plug but after a while, I don't see the point. Could sell the Jeep to the next guy and he wants to add factory controlled AC....now he's hosed.

You can delete it as the wiring serves no purpose, but I'd say just leave it.
I'm keeping it now, for that reason. Next person might need it. Cheers
 
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