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.
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.
04 Sahara, with a lift, some stuff, and a few things, on some 33's, blah, blah, blah.
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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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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!
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 I’m back to square one anyone have any ideas??????????????????