1989 Jaguar XJS False high heat reading

1989 JAGUAR XJS
145,000 MILES • V12 • 2WD • AUTOMATIC
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[email protected]
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The dash heat gage quickly goes to a high heat reading. If I open the hood - the engine does not seem overly hot. The electric cooling fan does not engage - so either the fan is not working, or it does not sense it is hot enough to kick in. Could this be a relay or temp sending unit, or?
Apr 19, 2009 at 12:25 PM
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JAMES W.
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Do you have a digital or analog dash? Also, does the the temp indicator jump imediately or gradually? Please advise.
Apr 19, 2009 at 1:43 PM
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[email protected]
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It is analog. The gage goes up fairly slowly - then very fast and sometimes rather jumpy.
Apr 19, 2009 at 1:58 PM
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JAMES W.
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I have to believe it's a problem with the temp sending unit. If you unplug the single wire connector to the sender, the gauge should go to "0". If yes, change the unit.


https://www.2carpros.com/forum/automotive_pictures/248092_89_XJS_temp_1.jpg


https://www.2carpros.com/forum/automotive_pictures/248092_89_XJS_temp_1_1.jpg

Apr 19, 2009 at 4:58 PM