2001 Toyota Corolla: air blower fan switch


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Old 10-03-22, 04:20 PM
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2001 Toyota Corolla: air blower fan switch

2001 Toyota Corolla - the fan air blower switch has been working intermittently and now does not work at all. No air blows at all. Removed the relay under the hood and put it back in to see if it was loose but that did not work.
One other strange thing - the switch has "off" 1, 2, 3, 4. When you turn the switch completely off the idling of the car lowers. Weird. Bad relay, bad fan or something else?

Thanks.


 
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Old 10-03-22, 04:45 PM
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If the control is in A/C or defrost and sometimes heat.... when turning on the system the A/C cycles to dry the air. So when the system/blower is shut off the idle will go back to normal.

That would indicate the switch is working. You will need to determine if there is a problem with the speed resistor control block or the blower motor is bad. Typically the blower relay operates in max speed and bypasses the blower resistors. If that's not working you need to check for power on the blower motor.

blower resistor block
 
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Old 10-03-22, 05:23 PM
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Thanks PJ. How would I go about testing the speed resistor control block?
 
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Old 10-03-22, 08:35 PM
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It usually as four contacts.
Three go to the fan switch and one goes to the blower or the high speed relay.

Testing it un-plugged with an ohmmeter... there should be continuity between any two terminals.
 
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Old 10-03-22, 08:46 PM
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Your problem sounds like a bad resistor. PJ has you on the right track. There are dozens of YouTube videos on it, maybe even one for your model.
 
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Old 10-04-22, 07:26 AM
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Thanks XSleeper. Is the resistor the same as what I called the relay - in the fuse box under the hood? Or something different?

 
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Old 10-04-22, 09:12 AM
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No. It's usually mounted to the blower motor.

https://www.autozone.com/cooling-hea...ota/camry/2001

I put the wrong model in, but you get the idea.
 
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Old 10-04-22, 09:35 AM
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Gotcha - thanks.
 
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Old 10-04-22, 09:39 AM
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Sometimes on the blower motor housing, near the blower motor. Just follow the wires. You can usually test them with a multimeter as you move the switch through its positions.
 
 

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