Question about 2003 Chevrolet TrailBlazer

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2003 Trailblazer A/C blower won't shut off

The front a/c blower won't shut off. I had to pull the fuse to keep from draining the battery. I couldn't find a relay. Any suggestions??

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  • LillianF Jun 16, 2008

    My 2003 trailblazer ltz ac fan will not shut off after turning off key, I cannot get it in to get looked at until next week. I am having to disconnect battery to avoid running my battery down. I tried removing fuses but it keeps blowing. Please help!

  • rdutton3477 May 02, 2009

    I have the same issue on my trailblazer and had to disconnect the battery...anyone know what causes the issue?



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Replaced the control module

Posted on Jun 07, 2008


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2003 Lincoln LS. When I shut the car off the brake lights won't shut off. Pulled the fuses just so the battery wouldn't get drained but that didn't work! Battery died and had to charge it. Thx

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I have a 2003 Chevy trailblazer. The fan keeps running even when the ignition os off. The fan is draining the battery . What is th eproblem?

Your problem is most likely the fan relay. It is normally under the hood in the fuse box. Open the fuse box locate the fan relay (most are labeled ) If labeled tap on that relay and the fan should shut off if it does the relay needs to be replaced. If its not labeled tap on the relays one at a time till it shuts off. The one you tap that shuts it off is bad pull it out like a fuse and replace it. 4 thumbs up is appreciated if this helps.

Dec 23, 2010 | 2003 Chevrolet TrailBlazer

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There is a resistor for the blower that has a relay built into it that sticks in the run position on high. The resistor is usually bad and sometimes the connector is also burned. The resistor is on the passenger side under the dash near the blower.

Oct 27, 2009 | 2003 Chevrolet TrailBlazer

2 Answers

2003 Chevy Trailblazer my AC blower won't turn off!

you have a short to power which will cause it to stay on constantly check your blower motor resistor pack to ensure that it is working and check the wires going to the blower to make sure you have a power and a ground

Jun 29, 2009 | 2004 Chevrolet TrailBlazer

1 Answer

Blower motor fan won't shut off when car is off

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1 Answer

Blower control module

There should be a relay for that blower. sounds like the relay is stuck. see if you can find out where it is and replace it. You should find that info in a service manual for that vehicle. hope this helps: )

Jan 17, 2009 | 2003 Chevrolet TrailBlazer

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