What gauge not reading , Temperature ? you posted back in 2011 ? You did feel you should take it to the repair shop ? You need to take this to a ASE certified repair facility ! This is a complex electronically controlled cooling system , Three relay's controlled by the ECM -engine control module turn the fans on in two different speeds ! There could be DTC'S diagnostic trouble codes stored in the ECM, HVAC module , BCM !
Circuit/System Description
The engine control module (ECM) commands the fans ON in high speed or low speed. In low speed, the fans are configured in series. In high speed, the fans are configured in parallel.
In low speed operation, the ECM applies ground to the coil side of the low speed fan relay, which is the Fan 1 Relay. Voltage is applied directly to the left cooling fan through the switch side of the low speed fan relay. The right fan is connected in series to the left fan through the de-energized Series/Parallel relay, which is Fan 2 Relay, so that both fans operate at low speed.
In high speed operation, the ECM applies a ground to the coil side of the low speed fan relay, the Series/Parallel relay, and the high speed fan relay, which is the Fan 3 Relay. Voltage is applied directly to the right cooling fan through the switch side of the high speed fan relay. The left cooling fan obtains voltage through the low speed fan relay and ground through the Series/Parallel relay.
When the ECM is commanding a fan relay ON, the voltage of the control circuit should be low, near 0 volts. When the ECM is commanding a fan relay OFF, the voltage of the control circuit should be high, near battery voltage.
One of the relays could be stuck on ! An for the gauge you have to have it removed an fixed , there is a stepper motor behind the gauge needle an they go bad ! Or replace the instrument cluster !
SOURCE: 1999 Chevy Cavalier Z24 2.4L cooling fan inoperative
yes you could have a bad ECT or the relay could be bad it sounds more like the relay is heating up and kicking out
SOURCE: cooling fan continues to run after turning car off
Try change the Fan Assy....there a small box with state (Gate) on the upper right of fan assy... it does controling the sped of the fan...
SOURCE: 2002 malibu runs hot.
Sounds like you have a faulty head gasket or maybe a cracked head.This can cause overheating and the check engine light to come on.The code for the o2 sensor is probably caused by coolant getting into the exhaust system and coating the sensor.The coolant fan may work but it cannot remove enough heat from the rad to make the engine cool off.Try some engine coolant stop leak to see if it will help.This maybe only a temperary fix.Let me know if you need more.MOE
SOURCE: engine hot ac turned off on 2008 chevy silverado.
My truck is doing the same thing, also the gas gage is no longer correct, it was all due to a wiring harness i believe, covered by warrenty
Battery and brake Warning lights on
Dash
http://alltypesofpartsreplacing.blogspot.com/2012/10/battery-and-brake-warning-lights-on-dash.html
--------------2002 Ford Windstar: Brake
Warning Light ON dash?
http://schematicsdiagram.blogspot.in/2012/06/2002-ford-windstar-brake-warning-light.html
-------------ABS & Brake warning
lights remains steady on dash?
http://schematicsdiagram.blogspot.com/2011/12/abs-brake-warning-lights-remains-steady.html
-----------Chevrolet Tahoe Hood open
warning on dash and alarm sounds?
http://schematicsdiagram.blogspot.com/2011/12/chevrolet-tahoe-hood-open-warning-on.html
-----------2005 Chevy Impala: Service Vehicle Soon
Warning Light?
http://whoisbyme.blogspot.in/2012/06/2005-chevy-impala-service-vehicle-soon.html
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Malfunction Indicator Light ON
http://whoisbyme.blogspot.in/2012/06/malfunction-indicator-light-on.html
-----------Car Runs Fine But Check Engine light is ON?
http://whatisbyme.blogspot.in/2012/05/car-runs-fine-but-check-engine-light-is.html
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Check engine light with codes P2195 and
P2197?
http://howtobyme.blogspot.in/2012/01/check-engine-light-with-codes-p2195-and.html
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How to Read Codes from Check Engine Light?
http://schematicsdiagram.blogspot.com/2011/12/how-to-read-codes-from-check-engine.html
-------------These will help.Thanks.
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Wow...thanks for all of the information. My post was supposed to say my problem is exactly like one posted on Aug 17, 2011. By Alkabten. thought I could get out of all the explaining, because mine exactly as he explains.
Thank you Jeff A.
Temperature gauge not working, right. it stopped doing this for a couple of days...and then today...turned it on, same thing. Does this give you any help?e
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