Question about Chevrolet Camaro

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I have a 1991 Camaro RS 3.1 V6 with the radiator cooling fan not working. There's no voltage to the fan motor. I changed out the relays (cheap replacement.) The heater blower motor switch also doesn't work, are they related to making the electric radiator cooling fan work?

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  • Malcolm Nov 06, 2010

    '91 Chevy Camaro RS 3.1 V6 with the coolant fan not working. I replaced the relays to the fan and tested the voltage to the fan with no reading. The fusebox has good fuses. What other checks can I do? The engine coolant will boil into the resevoir and over heat.

  • Malcolm Nov 06, 2010

    The connections are good from the relays to the cooling fan. The fusebox is located under the dashboard and they are good also. What other checks can I do?

  • Malcolm Nov 09, 2010

    I cannot find the inline fuses, the schematic in the Haynes manual calls it a fusible link, my best guess is the coolant fan switch, which is told to be on the rear of the passenger side cylinder head which I cannot see, also I'm told that it is the coolant temperature sensor can be the problem where is that sensor located?

  • Malcolm Nov 10, 2010

    I have a 1991 Camaro V6 3.1 with the radiator coolant fan not working. Where is the coolant fan switch located I'm told it is on the passenger side rear of the cylinder head, which I cannot find. The inline fusible links I cannot locate either. I'm frustrated that the fan doesn't work.

  • Malcolm Nov 13, 2010

    Yes this solution is very helpful Thank you

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  • Master
  • 1,016 Answers

Hi, Below are the faults and the solutions for those faults.
Possible Faults:

  1. Radiator cooling fan not operating, due to no voltage to the motor.
  2. Inside heater blower motor also not operating.
Solutions: Radiator cooling fan
  1. Check the fan fuse for the radiator fan, there are 2 fuse's - One main fusible link which is under the hood and the other is a 20 amp fuse inside the vehicle fuse box.
  2. Using a fused jumper connect the ALDL connector terminal B to a good ground(Pic 1), switch ignition to RUN position the fans should operate.If they do then you have a ECM signal fault.
  3. Have your coolant temperature sensor checked, this is the one for the switching of the fan not the temperature gauge sensor. The sensor for the fan has 2 wires in the connector the one for the temperature gauge only has one.
Solutions: Blower motor not operating
  1. Check main fusible link which is in under the hood in the main fuse block, also check the 25 amp fuse in the inside fuse block - HTR A/C
  2. Check voltage supply from the A/C mode switch to the blower motor speed switch.
  3. Check that you have voltage from the blower switch to the blower motor resistor which is housed in the heater assembly.
  4. If all this is ok then replace blower motor.

If all the above has not solved your problems please let me know, I can give you more indepth information.
Thanks
Jason

Posted on Nov 10, 2010

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  • Chevrolet Master
  • 22,156 Answers

No blower motor is seperate wiring but they could have a common feed ,now under the bonnet is a fuse/supply box and the main power is drawn from here so i would suspect the fault is in here either a big fuse or the wires have burnt and corroded on the connections .But as i have never seen one except of dukes of hazard i couldnt tell you exactly what terminals or connections they are but this is where the fault lies iam sure ,this happens a lot on older VW golf and seat with alloy fuses .

Posted on Nov 06, 2010

  • Colin Stickland
    Colin Stickland Nov 07, 2010

    yes fuses look good but have you checked for power to the internal fuses ?? before they go to the fan

  • Colin Stickland
    Colin Stickland Nov 12, 2010

    sorry but i have never worked on one so i have no product knowledge so i wouldnt know where anything is ,if i had vehicle in front of me i would soon find it though .just follow the wires to start with and see where they go is what i would do first ,and check the ends as i find them and test for a feed

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