Question about 1989 Chevrolet Corvette

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Blower motor runs all the time even with key off

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  • 65 Answers

Sounds like a bad relay. For 89 that should be under the hood i think. Go to advance/auto zone as it should just use a regular relay. Look in the haynes repair manual while there for where it is located.

If not a relay then could be a bad switch (the dash unit)/

Posted on Mar 27, 2009

6 Suggested Answers

emissionwiz
  • 61249 Answers

SOURCE: Blower motor stays on high, even with key out

the blower motor speed control module is defective, replace it.

Posted on Dec 24, 2008

  • 14036 Answers

SOURCE: 2006 monti carlo blower motor stuck on high, even

what blower you talking about.if ac blower your blower relay stuck close. your monte carlo has a super charger blower also.

Posted on Jul 05, 2009

  • 47 Answers

SOURCE: 2003 Chevy truck blower motor runs even with key

sonds like a faulty resistor

Posted on Aug 02, 2009

  • 7353 Answers

SOURCE: My heater's blower motor runs even when the car is OFF

You MAY have an "Ignition Switch " thats bad.

Posted on Nov 16, 2009

wracefans24
  • 1985 Answers

SOURCE: blower motor runs even when vehicle is turned off

you need to check the blower motor resistor.

Posted on Jan 21, 2010

  • 1374 Answers

SOURCE: 90 buick park ave heater blower motor runs on high

The switch , relay, or motor are shorted out .
First locate relay and remove it to turn the blower off.
If you want to do the diagnosis yourself ...remove the switch first and see if the motor stops. if it does you've found the culprit. If not move onto relay if the relay removal kills the motor thats good news. if it doesn't then this thing gets B+ right from the battery at HIGH SPEED. Your gonna need Shop Manual
to show you where this thing connects to the battery.
So either the switch, relay, motor , or resistors ( in your case where battery connects to the motor are your problems.
Unlessyour really good with electrical items pull the relay and bring it to a repair shop.

Posted on Mar 31, 2010

Testimonial: "Good info I thought it was a relay but couldn't find it . pulled the ones from behind the glove box no effect. A new blower motor was installed 3mon "

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Most would say it is the Blower Motor Resistor or a relay..And possibly the dash heater control knob..However it is running all the time even with key off..This means it is getting power all the time from somewhere..It sounds as if wiring is crossed..Did you have to change wiring plug in connectors..?..

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You have a bad blower motor relay, when the relay goes bad. It can freeze in the on position keeping the contact closed to run your blower motor. Inspect the blower motor relay and wire harness for any short due to burnt wire, this is a common issue with that year of Silverado's
Thank you for using fixya and good luck.

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I REPLACED MY BLOWER MOTOR, BUT I HAVE TOUBLE WITH THE 30amp #30 FUSE MAKING THE FAN RUN ALL THE TIME, IS IT THE RESISTOR OR SOMETHING ELSE ???


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Blower motor continues to run when vehicle is off


Your problem is the Relay which is encased inside the Heater/AC Resistor Module. This is a very common problem with GMC and Chevy Trucks. The Relay's return spring fails and the relay is held closed by gravity. The only fix is to replace the Resistor Module. I have a 2004 Silverado and have replaced the Module 3 times and the Blower Motor twice. The Orange wire feeding the Module is always Hot (12V) and feeds the Relay Contact for Highest Blower Speed. Hence the Blower runs all the time even with the Key off and removed.

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2 Answers

Blower motor stays on high, even with key out


the blower motor speed control module is defective, replace it.

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