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Splicing a new pigtail on a blower motor resistor trailblazer

My fan doesn't work on any speed. So I replaced my blower motor resistor, while in there I noticed that a few of the wires were charred so I thought it would be smart to splice a new pigtail plug. I did splice it but now I only get air on one speed 2. I'm guessing that I didn't connect the wires properly. My old pigtail has colored wires, the new one only has white and black wires. What wires need to be spliced together in order for me to get full blower power?

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Posted on Jan 02, 2017

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SOURCE: Blower motor or resistor?

Yes its the blower motor resistor.

More then likley theres some trash or something in it, or possibly the motor itself is on it's way out. There not that bad to pull out of that body car, just pull it out and see what you can see.

The blower motor is under the glove compartment

You can replace the resistor on your own. Please find a detailed diagram which would guide you to do it.


Posted on Apr 09, 2009

  • 58 Answers

SOURCE: i pulled the wires out of the abs plug that goes

Splicing your wires together will accomplish nothing but to waste your time.The sensors send an electrical signal to the computer.No signal means no ABS and the light will turn on.You will not get a signal by splicing the wires.

Posted on Oct 18, 2009

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SOURCE: Need help with 2004 Chey Trailblazer Ext LS.

Is the system manual or automatic controlled HVAC? If more info needed will post email so can send more. This is for the manual HVAC and auto2e9074a.gifto 0ff108b.gif35110ad.gif

Posted on Oct 18, 2010

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SOURCE: need to hook up electronic brake control for

There is not a quick plug. You will need to hardwire it. This can be a daunting process but not impossible. Click here to view a pdf illustrating basic installation of a universal brake controller kit 51500 from

Posted on Jan 13, 2011

  • 339 Answers

SOURCE: I have 06 trailblazer, on

{: ) Try first to repair the terminal connectors to achieve a tight connection and contact. Check also the integrity of the black wire which is supposed to be the ground wire. Its a better option if you replace also the resistor along with connector.

Posted on Jun 10, 2011

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Many cars and trucks use what is called a "resistor pack" that is used to determine various preset speeds for the heater & A/C blower or fan. When you switch the fan from one speed or another, power is passed through a different value of the resistor - which changes the voltage to the fan motor. The different voltages provides different speeds.

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Check your blower motor resistor connection.Turn switch and fan on then wiggle the resistor pigtail fan should turn on if not replace resistor.These get to hot and usally melt the pigtail and loose their connection.

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Question:If the 30 A. fuse on a 2002 focus dash blower motor is good,and the thermal resistor is replaced, then it must be a faulty speed switch?

Don't know where you got your info . The heater blower motor electrical B+ power comes from Fuse F 64 a 40 amp fuse . This goes right to the blower motor on the green with orange stripe wire , The black with red stripe wire goes to the switch for high speed . There is Splice 24 that ties into the black with red stripe wire. The splice 24 turns into a black with orange stripe wire . An this wire goes to the blower motor resistor . All the switch does is route the B+ voltage through the different resistors to ground .

Thermal resistor "usually" stops working is because of faulty fan speed switch ???? Totally not true , resistor assemblies fail because of the heat associated with dropping voltage across the resistors , That is why they put the resistor assembly in the air box . Air blows over to cool the resistors . The switch is nothing more then a way to direct different speeds to ground .

Rather then listening to other people ,why not learn the right way to test electrical circuits .
Electric Testing Techniques You Need to Know

Do you know what a wiring diagram is ? Enter vehicle info . Under system click on HVAC , under subsystem click on heater . Click the search button , then on the link . Use a volt meter an test , don't guess !

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My blower motor only works on 1 & 2 & 3 speeds dont work on 4 & 5. I was told to buy a blower motor. Need to know where this is located to replace on my 2005 Chevrolet Trailblazer

If your blower works at some speeds and not others, the likelihood of the blower motor needing to be replaced is low. The more common problems would be either the switch or the resister that regulates the motor speed. The resistor is usually located in the air duct under the dash.

Jun 17, 2011 | 2005 Chevrolet TrailBlazer

1 Answer

AC blower fan no working on any speed. Somtimes works on speed 5.

The blower motor resistor needs replaced.Would also check the harnesses going to the resistor and blower motor for signs on melted wiring or poor connection.You may also need new pigtails if there is evidence of of wiring damage.

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