buck_hunter Posted July 23, 2012 Share Posted July 23, 2012 So i got a little problem, bought my jeep a little while back and have been fixing odds and ends on it for a while now. Ever since i bought it my temp gauge has not worked but i just never thought anything about it. Just recently my stock radiator blew a hole in it, so i went out a got a new one. I thought it would be a good time to troubleshoot my non working temp gauge. Long story short i put the new one in and still no temp gauge. I'm still new to the comanche way of doing things lol so any help would be nice...Thanks! Link to comment Share on other sites More sharing options...
relyt120 Posted July 23, 2012 Share Posted July 23, 2012 You should check to see that the temperature switch was replaced with an actual sender. If it has a switch then your gauge won't work, also it could just be that the connector has come loose from the sender. Link to comment Share on other sites More sharing options...
buck_hunter Posted July 23, 2012 Author Share Posted July 23, 2012 where would the switch/sender be located...i noticed a sensor of some sort that screws into the driver side of the radiator which has a connector on the end of it...That is all connected Link to comment Share on other sites More sharing options...
Zenobian_84 Posted July 23, 2012 Share Posted July 23, 2012 If you have a 2.5, the sender will be on the driver's side of the engine block (if you were sitting in the driver's seat), right next to the valve cover. It should have a pink wire with a little L shaped cover running to it. Should look like this. (switch for a guage, not idiot lights) If you have a 4.0, it should be near or in the same spot I believe. :cheers: Link to comment Share on other sites More sharing options...
buck_hunter Posted July 23, 2012 Author Share Posted July 23, 2012 Ok got it..i replaced that as well when i did the radiator and its hooked up also.... Link to comment Share on other sites More sharing options...
relyt120 Posted July 23, 2012 Share Posted July 23, 2012 If you replaced it with a sender and its still not working then you probably got a bad gauge. I don't see why you would have replaced it at the same time as the radiator since it is on the rear part of the engine block, just make sure you are talking about the same thing that we are. Link to comment Share on other sites More sharing options...
buck_hunter Posted July 23, 2012 Author Share Posted July 23, 2012 I replaced it. Reason being is when i got the new radiator from the auto store i also told them i needed the sender for my gauge not know what it was that was what they gave me. So i did some searching around and found where it went...hence why it has been replaced lol. So say i do have a bad gauge am i going to have to replace the whole gauge cluster? Link to comment Share on other sites More sharing options...
Zenobian_84 Posted July 23, 2012 Share Posted July 23, 2012 So say i do have a bad gauge am i going to have to replace the whole gauge cluster? If you remove the gauge cluster from the dash, the gauge will be held on by 3 screws IIRC. Just un-screw and screw in another one. :cheers: Link to comment Share on other sites More sharing options...
buck_hunter Posted July 23, 2012 Author Share Posted July 23, 2012 Ok thanks. Are these swappable with anything? basically if i find a cherokee at a JY what year etc would i look for to find a gauge on? Link to comment Share on other sites More sharing options...
buck_hunter Posted July 23, 2012 Author Share Posted July 23, 2012 Also. i noticed the sensor next to the valve cover which is the coolant temp sensor? so what is the other thing that screws into the drivers side of the radiator with an plastic connector on the end? it also says coolant temp sensor? Link to comment Share on other sites More sharing options...
relyt120 Posted July 23, 2012 Share Posted July 23, 2012 Should be able to get one out of a jy Cherokee of a similar year, I would stay away from 90+ if yours is 90- just to be safe. -the one coming off of the radiator controls the electric fan on/off Link to comment Share on other sites More sharing options...
buck_hunter Posted July 23, 2012 Author Share Posted July 23, 2012 Ok thanks...also if my electronic fan ising working could that sensor be faulty or is there another problem to look for....or is there any way to rewire the fan so i have a toggle switch on the dash? Link to comment Share on other sites More sharing options...
HOrnbrod Posted July 23, 2012 Share Posted July 23, 2012 Back to the topic: Check the gauge wiring between the temp sensor and the gauge first. Turn ignition to RUN (do not start). Remove temp sensor wire connector from the sensor. The gauge should indicate HOT to the right. Then touch the sender wire to ground. The temp gauge should indicate COLD to the left. If the gauge does not react this way you probably have a wiring problem (open circuit). If it does, you probably have a defective sensor. Link to comment Share on other sites More sharing options...
buck_hunter Posted July 23, 2012 Author Share Posted July 23, 2012 Ok will check that out tonight after work. Thanks Link to comment Share on other sites More sharing options...
relyt120 Posted July 23, 2012 Share Posted July 23, 2012 Back to the topic: Check the gauge wiring between the temp sensor and the gauge first. Turn ignition to RUN (do not start). Remove temp sensor wire connector from the sensor. The gauge should indicate HOT to the right. Then touch the sender wire to ground. The temp gauge should indicate COLD to the left. If the gauge does not react this way you probably have a wiring problem (open circuit). If it does, you probably have a defective sensor. Link to comment Share on other sites More sharing options...
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