How to change out the front Blower Motor?

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How to change out the front Blower Motor?

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Chevrolet Forum >> Chevy Trucks, Vans & SUV's >> Venture >> How to change out the front Blower Motor?

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How to change out the front Blower Motor? - 4/23/2008 6:39:17 AM

mchgnmike

Posts: 4
Joined: 5/6/2007
Status: offline

My 2004 Venture is making horrible sounds when the A/C fan is on. It first started with the lower speed switch setting (1, 2 and 3) but now is squeaking and vibrating the whole van. Unfortunately I gave my factory shop manual away with our 1999 Venture when I sold it so I need to know how to replace the blower motor in my 2004.

Does anyone have any insight or instruction on how to best replace my front blower motor in my 2004 Venture?

Thanks

Post #: 1

RE: How to change out the front Blower Motor? - 4/23/2008 10:47:03 AM

rabbit0102030

Posts: 465
Joined: 4/3/2007
From: New Braunfels, TX
Status: offline

Are you sure it is the blower motor? I hear the most common problem is the resistors going out.

Check the resistor first:

Pull the connector from the blower motor resistor - as you're looking at the plug with the slots.

The connector looks something like this as you look at it:
                ________________________________
        _____!____!___!______________!____!____!______
        !__________________________________________!
        !_____!____!______!_____!_______!_____!_______!
        !__G__!_F_!___E__!__D__!___C___!__B_!___A__!
        !_____!____!______!_____!_______!___ _!_______!!

The letters are to help you with the next part.

E is the ground. Touch one probe to it from your test light or multimeter for each test and follow the order. Each terminal corresponds to a blower setting. You should get about 12 volts for each test with the ignition on, but the engine not running. The blower resistor steps down the voltage to get the blower to spin at the appropriate speed.

A+ E = SPEED SETTING #2
B+E= SPEED #1
C+E= SPEED #4
D+E= SPEED # 3
F+E = SPEED # 5 (HIGH)
G IS HOT AT ALLTIMES YOU SHOULD ALWAYS GET 12 v HERE

If you don't get 12v at each setting, when you change the switch to the corresponding setting and test then the switch is most likely the problem, assuming that the connector at the back of the switch is attached securely and that the wires are in good condition, if all settings get 12 volts when you switch to them, then the blower resistor is most likely your problem.

This gives you enough info to test it, see below to replace it.

//

There are two Blower Motor Resistors, the main resistor is located under the dash on the right side. The Auxiliary Blower Motor Resistor is behind the left side rear quarter trim panel.

Main Blower Motor Resistor

Auxiliary Blower Motor Resistor Connector (1)

Auxiliary Blower Motor Resistor

If your sure it is not the resistor then the above diagram still gives you a good idea how to remove the blower.

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(in reply to mchgnmike)

Post #: 2

RE: How to change out the front Blower Motor? - 4/23/2008 7:17:14 PM

shawnvw

Posts: 801
Joined: 1/18/2008
Status: offline

If the blower motor is making a vibrating and making a lot of noise, then the fan was probably out of balance at one time and has probably ruined the motor by now. No need to check the resister since the fan works but is just making noise. start by taking off the passenger side hush panel under the dash. Disconnect the electrical connector, remove the 3 7mm screws and the motor should fall out. the pics above show the motor under the hood, don't look there cause you won't find it...the motors do look similar though.

(in reply to rabbit0102030)

Post #: 3

RE: How to change out the front Blower Motor? - 4/24/2008 10:50:22 AM

mchgnmike

Posts: 4
Joined: 5/6/2007
Status: offline

Shawn and Rabbit, I will check both. I am pretty sure that it is the motor alone. However if I am in there replacing the motor I will probably replace the resistor as well.

Thanks for the detailed information. It will make the process much easier.

(in reply to shawnvw)

Post #: 4