Question about 2004 Chevrolet Cavalier
With engine running and hot, check for voltage at the fan connector. If yes, replace fan. If no, interrogate relay socket to see if PCM is trying to turn fan on.
See my note here on how to troubleshoot the relay socket: http://www.fixya.com/cars/r6022358-relay_check. If your gage runs off the same sensor and works, it's probably fine. If you're good with electronics, you can also test the sensor. If these are all good, either the wire to the fan is bad or the fan itself is bad. You can test the wire for voltage with a test light hooked to the fan connector, and you can test the fan by hotwiring it to the battery
Posted on Oct 05, 2010
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Posted on Jan 02, 2017
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