Question about 1992 Chevrolet Corvette

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1992 corvette - cooling fans do not actuate at temperature.

Thermostat appears to be working when travrling at highway speeds, but engine temp shoots up to 260 when in traffic. Fuse box has no fuse for cooling fans. Manual says this an aux fuse box but I can't find it.

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  • luvtosnap2 May 15, 2009

    No, fans do not come on. Compressor doesn't even come on. Fuse for compressor is good.

  • luvtosnap2 May 17, 2009

    A/C on, I get nothing. Replaced the relays, nothing. Temp switch is next I guess. Fans spin freely by hand, so they're not frozen.

  • luvtosnap2 Jun 29, 2009

    Replaced relays a couple of weeks ago, no change. Replaced temp switch today. Fan comes on when car first fires up. drove it around the area thought all was ok. Then the fan stopped working again.

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Do the fans come on when you turn on the air conditioner. I do believe the temp switch for the fan is on the passenger side of the engine above the starter.

Posted on May 15, 2009

  • Clint Smock
    Clint Smock May 16, 2009

    Have you checked for power at the fans with the A/C switch on. I can look up the diagram and also the relay location.

  • Clint Smock
    Clint Smock May 17, 2009

    Do you have a test light? Check your power supply on the relays. They should be on the left side of the radiator shroud. With the key on, you should have power on the Pink and black wire and the Red wire. Both relays are turned on by the ECM so it doesn't have a temp switch above the starter. The ECM turns them on by using the coolant temp sensor in the intake. To test the motors, jump the Red wire to the Black and Pink wire at the Relay with the relay removed.

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  • 4 Answers

Try a low tempertature switch that turn the fans at 195degrees & of at 180. from (corvette central)

Posted on Jan 10, 2010

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the system should cycle 4 to 7 times/minute at 79 degrees F.

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The electronically controlled fan clutch is controlled by the powertrain control module (PCM) based upon requests for airflow to cool the engine, transmission and A/C condenser. If no cooling is required, the electronics permit the fan to spin at a slower speed yielding improved fuel economy.
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  • ----------------------------------------------------------------------------
If the cause is not visually evident, connect the scan tool to the Data Link Connector (DLC).
Retrieve any DTC Codes (Diagnostic Test Code). Autozone will do for free.

--------------------------------------------------------------

The cooling fan clutch actuator valve controls the fluid flow from the reservoir into the working chamber. Once viscous fluid is in the working chamber, shearing of the fluid results in fan rotation.

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