Where is my temperature guage sending unit? ('98 XJ) - JeepForum.com

 
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post #1 of 12 Old 12-14-2010, 01:09 PM Thread Starter
LandRover
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Where is my temperature guage sending unit? ('98 XJ)

Is it on the thermostat housing?

Either my Jeep is running REEEEEEAAALLLY cold or the sending unit failed.
It's a '98, 4.0. I'm seeing random plugs everywhere...which one is the right one, or are there multiples?


RHD '98 XJ
RE 3.5", Bushwaker Flat Flares,
OR-Fab bumpers, PowerTrax locker,
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post #2 of 12 Old 12-14-2010, 01:11 PM
cornbrizzle
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It's the censor on the thermostat housing.




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post #3 of 12 Old 12-14-2010, 01:13 PM
CJ7-Tim
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Make sure the sender wire connection is clean and the wire is not damaged.

.
Attached Thumbnails
CTS - Theromstat.JPG  

.

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post #4 of 12 Old 12-14-2010, 01:13 PM Thread Starter
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Thanks.

RHD '98 XJ
RE 3.5", Bushwaker Flat Flares,
OR-Fab bumpers, PowerTrax locker,
Sliders, Goodyear Duratrac 33's
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post #5 of 12 Old 12-14-2010, 01:15 PM Thread Starter
LandRover
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I just bought it and I think the PO had the engine compartment steam-cleaned... it's super clean, but I'm wondering if this could have messed with a close-to-messed up wiring situation. I have a spare Jeep out back, I'll swap out the plug and see

RHD '98 XJ
RE 3.5", Bushwaker Flat Flares,
OR-Fab bumpers, PowerTrax locker,
Sliders, Goodyear Duratrac 33's
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post #6 of 12 Old 12-14-2010, 02:12 PM
dukie564
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incorrect to all the previous posts. The sensor Tim indicated is indeed the CTS, but it only is a switch that tells the thermostat when to open. The Coolant Temperature Sending Unit for the gauges is at the rear of the head on the drivers side of the valve cover on a late model XJ.


1995 XJ Cherokee Sport
4.5" Homebrew Lift, 4.0L HO I-6, AX-15, NP231, D30(Open)/C8.25(Locked)
33x12.5 Mickey Thompson Baja MTZ Tires, 309,000 mi and runnin' strong
http://www.jeepforum.com/forum/f22/p...rt-xj-1297118/
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post #7 of 12 Old 12-14-2010, 02:40 PM Thread Starter
LandRover
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^^ true for 97-01 XJ's?

RHD '98 XJ
RE 3.5", Bushwaker Flat Flares,
OR-Fab bumpers, PowerTrax locker,
Sliders, Goodyear Duratrac 33's
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post #8 of 12 Old 12-14-2010, 02:51 PM
dukie564
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correct...true for 91-01 XJs

1995 XJ Cherokee Sport
4.5" Homebrew Lift, 4.0L HO I-6, AX-15, NP231, D30(Open)/C8.25(Locked)
33x12.5 Mickey Thompson Baja MTZ Tires, 309,000 mi and runnin' strong
http://www.jeepforum.com/forum/f22/p...rt-xj-1297118/
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post #9 of 12 Old 12-14-2010, 02:54 PM
Carves
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Quote:
Originally Posted by LandRover View Post
^^ true for 97-01 XJ's?

ummm .... No.

Coolant temp sensor is as depicted in the pic posted by CJ7-Tim
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post #10 of 12 Old 12-14-2010, 02:56 PM
CJ7-Tim
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OBD-II, 1997-2001 only have 1 sensor.

.

A recent Gallup public opinion poll shows the NRA, at 58% approval, has a higher approval rating than either Hillary Clinton or Barack Obama.

Progressive Liberalism: Bringing you new Healthcare ideas so wonderful, they have to include mandatory participation ...

Originally Posted by Ronald W. Reagan: Government is not the solution to our problems; Government is the problem.
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post #11 of 12 Old 12-14-2010, 02:59 PM Thread Starter
LandRover
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Ooh this is getting good. Is the rear one a guage feed and the front one a thermostat switch, or what? Is the rear one just for pre-97's? The Jeep isn't here so I can't look for the rear one.

Edit, posting at the same time as Tim. I've heard of having to plug that rear hole when doing a head swap on a newer one...

RHD '98 XJ
RE 3.5", Bushwaker Flat Flares,
OR-Fab bumpers, PowerTrax locker,
Sliders, Goodyear Duratrac 33's
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post #12 of 12 Old 12-14-2010, 03:12 PM
dukie564
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hmmm...i found two separate part numbers and descriptions in the parts guide, and thought that it was the same for all late model XJs with the temp gauge. Disregard my post i suppose. Learn something new every day.

1995 XJ Cherokee Sport
4.5" Homebrew Lift, 4.0L HO I-6, AX-15, NP231, D30(Open)/C8.25(Locked)
33x12.5 Mickey Thompson Baja MTZ Tires, 309,000 mi and runnin' strong
http://www.jeepforum.com/forum/f22/p...rt-xj-1297118/
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