Question about 1996 Chevrolet Blazer

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Blower Motor works erratic. If I handle wiring harness near motor....blower cuts in and out???not fuse what is the Relay or Resistor???

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  • Chevrolet Master
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Neither relay nor resistor if handling the wiring harness makes it cut in and out.
It is either a connection in the harness, cut insulation in the harness, or broken wire in the harness.
Try different speeds. If it is all speeds, then it is the ground connection that is erratic.

Posted on Oct 09, 2010

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  • Master
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Loose connection is what you have here

Posted on Oct 09, 2010

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I have a 2004 ford f250 that the blower motor isnt working. Checked fuses and relay ok. No power at connector on blower motor, hooked up jumper wire to circuit and now works fine


You have a bad blower motor resistor ! It's near the blower motor ! has four wire connector to it ! The orange an black wire at the blower motor comes from the resistor !

Blower Motor Resistor 1AHBR00036

Apr 04, 2015 | 2004 Ford F250

Tip

No heat blowing


on most vehicles when the heat stops blowing it's usualy not a fuse or a relay but the blower motor or the blower motor resistor.
Here is a good way to check if it's the blower motor. Disconect the plug going in to the blower motor, Now run two long wires from the battery one on the negitive and one to the possitive. put power to the blower motor with theese wires, negitive to one post and possitive to the other .Does'nt matter what post you hook to the blower motor will just spin the opisite way. if the blower motor spins then you can rule out the blower motor and suspect the blower motor resistor is bad. to find the blower motor resistor all you have to do is follow the wirring from the blower motor. The resistor will be at the end of the wirring for the blower. The resistor will be mounted on the heater box near the blower motor and is usually held in by two screws.

on Feb 11, 2010 | Chevrolet Cavalier Cars & Trucks

1 Answer

Blower motor


I'm showing a blower relay and a resistor used on models with manual ac control.
The blower motor is grounded and the fan switch provides power thru the resistor. So you have a 40amp blower fuse that handles high thru the relay, then a 30amp HVAC fuse that powers the blower thru the fan switch.
Do you not have power from the resistor to the blower motor on the purple wire ?

Jun 26, 2013 | 2003 GMC Envoy

1 Answer

Blower fan only runs in positions 1-3, not on 4; relay or resistor?


Remove blower motor resistor and check to see if it discolored or melted. if so then replace blower motor resistor, also blower motor speeds 1-4 go through resistor, 5 goes direct from switch to blower motor. check wire harness connector at resistor, it should have six wires five power wires that corralate with the five settings on switch, so in each switch setting one wire should have power. the sixth wire is the ground. also harness connector to resistor it may be melted, if so go to dealer with vin number and get new harness connector with resistor.
I hope this helped.

Dec 17, 2011 | 1998 GMC Jimmy

1 Answer

HEAT DOSE NOT WORK WHERE IS BLOWER MOTOR LOCATED AND HOW DO I CHANGE IT


The blower motor is under the dash on the passenger side. You'll need to remove the plastic hush cover to get to it. These trucks are prone to this.
The blower motor fails because the resistor/ relay / wiring harness assembly overheats and can melt. Some of these have even caught fire. You're going to want to replace the blower motor resistor/relay and wiring harness assembly assembly too.
Check out all the wiring that goes into the resistor for heat damage. This assembly sits right next to the blower motor right above where the passengers feet would be. The resistor/relay is about the size of a pack of cigarettes and you'll see it right away. Make sure to disconnect the battery before working on any of this so you don't cause any more trouble while splicing in the new harness. I just did this on my 2006 Chevy truck and my blower motor was ok. I just had to replace the resistor/relay and splice in a new wiring harness. It cost $180.00 just for that stuff.

Dec 29, 2010 | 1998 Chevrolet K1500

3 Answers

My a/c only works on high. I was told that it was the blower motor resistor not sure where is located.


It's located near the fan motor on the passenger side duct work. It will have a harness plugged into it.
It's mounted with 2 sonic welds, to remove it pry under the mounting points to snap the welds. The replacement resistor is mounted with 2 self tapping screws.

Jul 21, 2010 | 2006 Chevrolet Colorado

2 Answers

Blower doesnt work on 1990 ford van e-150. I


most likely the blower motor! but could be the blower motor resistor! does it work on high setting? if so it is the blower resistor if not most likely the blower itself!

Sep 18, 2009 | 1990 Ford F150

1 Answer

Where is the front fan resistor unit?


Look under the van,on the drivers side near the radiator,it should be in that area.Follow the wires from the fans,they should go right to the module.This is for the cooling fans for the radiator.For the resister module for the blower motor look near the blower motor in the blower box.It is near the blower fan.It can be under hood,but it will be mounted with two screws.Remove the two screws,but you need to remove the wire plug in first.Pull it out .It goes inside of the blower box.If you replace this module,replace the blower motor also,because the blower motor is what causes the resistor to burn out.Did you check voltage at fuse with key on?If you did not check the fuse with key on,you got a false reading.If you checked the fuse with key on,look for a bad ignition switch,or a fusible link burned into coming off a pos. terminal post where the battery cable goes to under the battery.If the blower will not work at all even on high blower,the resister most likely not the resistor.The blower motor relay is most likely the problem.

Aug 29, 2009 | 2005 Dodge Caravan

4 Answers

2005 Chevy Surban blower motor resistor


When the blower is on speed 5, it is a direct 12 volts for high speed and the first four operate through the resistor, check your breaker for the blower motor to insure it is not cutting out.

Jul 18, 2009 | 1995 Chevrolet K1500

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