pentonkid Posted May 9, 2013 Share Posted May 9, 2013 I have a 1986 Comanche with the 2.5 motor in it. A few years ago my temperature light began to come on sometimes and I replaced the radiator. The temp light hasn't come on since. Can someone tell me how hot the coolant had to get for the sensor to trigger the light to come on? Thanks in advance. Link to comment Share on other sites More sharing options...
Geonovast Posted May 10, 2013 Share Posted May 10, 2013 That's a very good question. I too, am now curious. Link to comment Share on other sites More sharing options...
ParadiseMJ Posted May 10, 2013 Share Posted May 10, 2013 IMHO, I would think to "overheated" or red line...>>260F. Just a guess. It IS an interesting question though. Link to comment Share on other sites More sharing options...
HOrnbrod Posted May 10, 2013 Share Posted May 10, 2013 Years ago when I got my MJ, it had idiot lights, A/C, and a clogged cat. The temp light came on just before the aux fan when it was getting hot, right around 235*-240*. I later verified this with a full gauge cluster. Link to comment Share on other sites More sharing options...
pentonkid Posted May 10, 2013 Author Share Posted May 10, 2013 Thanks for the input guys! Logic tells me there must be a difference between a temp sensor for a gauge and one for an idiot light but my logic may be flawed. Can a temp sensor designed for use with an idiot light still be purchased? Link to comment Share on other sites More sharing options...
HOrnbrod Posted May 10, 2013 Share Posted May 10, 2013 Yes, but it's not a sensor, it's a temp switch for the indicator light. Autozone TU82 or similar. Link to comment Share on other sites More sharing options...
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