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Unread 01-19-2015, 12:26 PM   #1
Registered User
1988 YJ Wrangler 
Join Date: Oct 2013
Location: Griffin, Georgia
Posts: 33
temp gauge

A little history on the jeep. When I bought it the thing would barely drive down the road a lot of my own blood and the knowledge of the people on the forum she drives like a champ-ish.

I did the nutter bypass a couple of months ago and attempted to fix the rigged up wiring the PO did. Ive heard that yjs can pretty much run off of three or four wires and that would be cool but I would like my temp gauge to work.

Attached are the connectors that I thing control the temp gauge. If I am wrong can someone please let me know.

I have taken the dash apart and cleaned the connector connections.

I am in the process of cleaning all of the electrical connections in the engine bay.

As far as I know i have never had an over heating issue but I dont want it to start now.

Any help or ideas would be great.

If I am wrong on the connectors what do these go to and are the important?

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Unread 01-19-2015, 05:45 PM   #2
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1993 YJ Wrangler 
Join Date: Jan 2015
Location: Clayton, NC
Posts: 2
Temp Gauge

The temp sending unit is located at the back of the engine on the drivers side beside the valve cover and behind the fuel rail. It has one wire going into it.
Somewhere between $15-$30 to replace depending on brand.
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Unread 01-19-2015, 11:25 PM   #3
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timatoe's Avatar
1990 YJ Wrangler 
Join Date: Aug 2006
Location: Grass Valley California
Posts: 14,051
It is on the back driver side corner of the block, but not behind the fuel rail since you don't have one. The temp sender on the manifold tells the computer to go into closed loop, which isn't being used anymore since you did the Nutter. You also need to do something with that CTO valve, can't imagine it's running real well with a massive vacuum leak.

Read through THIS SITE it's for a CJ but will give you a good indication of what's going on with your 4.2, or at least how it used to work pre-Nutter.
Originally Posted by George Orwell
We sleep safe in our beds because rough men stand ready in the night to visit violence on those who would do us harm.
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