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Old 04-26-2008, 01:50 PM   #1
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a few qestions about a 03 rubicon

I am new to this jeep thing I just bought an 03 rubicon and noticed a few things. First is the temperature gauge seems to be stuck at about 140 degrees and will not move even when the engine is cold. I know it's not overheating because I drove it 200 miles and it never overheated. Next, is the dome lights have a issue to where it will not come on when you open the doors but when you turn the key off and take it out it comes on, also the switch will also turn the lights on. I just can't seem to figure it out.

Some one told me it might be the temp sending unit might be bad.

thanks for any input

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Old 04-26-2008, 01:54 PM   #2
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since the lights work as they should in other instances is sounds like somebody may have disabled the door switch/plungers so they could run w/o doors.

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Old 04-26-2008, 06:22 PM   #3
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how to fix

Does anyone know how to fix these problems or have some suggestions on what to do????????????????????
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Old 04-26-2008, 06:50 PM   #4
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The previous owner might have pulled fuse #4 located behind the glove box. That fuse is removed so you can have the doors off without the interior lights staying on. If that fuse location is empty, it needs a fuse so the interior lights will turn on when you open the doors.

Check the engine temp sender at the front of the engine next to where the top radiator hose enters the engine. Is the wire connector secure?
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Old 04-26-2008, 07:14 PM   #5
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right on the money

you guys were right on the money I check to see if the fuse was gone sure enough it was.

Anybody know any thing about the Temp Gauge being stuck or know of anybody that has had the same problem.

thanks
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Old 04-26-2008, 09:35 PM   #6
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I check it and everything was secured I even tried to unplug it and re connect it to see if that would and it didn't not. is there any way to test the temp gauge??
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Old 04-26-2008, 09:58 PM   #7
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To test the temp guage; pull the wire off the temp sensor, the turn the ignition to the on position. note what the temp guage reads. Next, take a test wire and connect it to the wire that you just took off the temp sensor, and connect the test wire to a good ground. If the temp guage moves, you temp sensor is bad. If it is still stuck on 140, you have a bad guage. What you are doing is creating an open circuit, then a grounded circuit, one should make the guage read cold and the other should make it read hot. If it dosen't move at all you have a bad guage. Hope this helps!
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Old 04-28-2008, 07:06 AM   #8
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back to square one

Well, yesterday I stopped at advance auto and got a coolant temp senor this is located on the front of the motor were the coolant hose goes into the motor. Installed it and the temp gauge did not work. then I try to see if the gauge was bad by hooking a ground wire to the connecter and the gauge did nothing. . I talked to one of my friends and he said that sensor controlled the fuel injection and not the gauge so Im back to square one anyone have any ideas??????????????????
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Old 04-28-2008, 10:19 AM   #9
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There's no "sensor" that controls the fuel injectors other than the 02 sensor on the exhaust header, certainly at least not the one by the coolant hose.

Sorry I'm all out of ideas on the temp gauge if you replaced the right sensor, and it sounds like you did. Can you post a pic of what you replaced so it can be double-checked?
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Old 04-28-2008, 11:10 AM   #10
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sure I'll do that this evening

thanks
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Old 04-28-2008, 12:04 PM   #11
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sure I'll do that this evening

thanks
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Old 04-28-2008, 08:51 PM   #12
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here is some pics

here is some pics of what I replaced and also took a picture of the gauge to.
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