Question about 1997 Dodge Dakota

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'98 - Blower works intermittantly regardless of fan speed setting

We **** the blower to work by tapping the HVAC housing with a soft tool. Or the tip of the passenger's show will work in a pinch. (Sometimes it takes more than two or three taps or kicks) We tried the resistor but no luck. It's OK. One thing to mention is it is high within the access hole so it's impossible to see unless you have a mirror. Why Dodge thought this was a good location for the resistor is anyone's guess. Almost directly in line with the passnger side valve cover, straight back through the hole and up close to the bottom edge of the windshield on the inner firewall Only thing we can think of is that the plug for the blower ( heavy green & black wires ) are corroded where the plug attaches to the blower. It is a ***** to get at. Looks like a full day job to remove the dash Tip: When putting the resistor back in, you might want to use small squares of cardboard as temporary lock nuts ( as in household switches and plugs ) to hold the screws in the resistor plate holes while reinserting back in it's mounting location. BE prepared to swear a lot.

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Dont forget to change the blower motor thats the cause of your problem

Posted on Oct 05, 2009

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2003 trailblazer blower not working


Are you saying the blower motor would run intermittently and then just stopped working? My first thought is faulty blower motor, I've seen faulty blower motors that would run intermittently. Any motor that uses brushes, you can tap on the motor to see if it will start working, that is a sign of bad motor brushes, replace the blower motor. There could be other issues?
Did you check the blower fuse, not only check the fuse, check the fuse circuit for voltage, use a test light. Check for applicable hvac trouble codes. With hvac on, check for voltage and ground at blower motor wiring connector, if both are good and no blower action, suspect the blower motor.
blower motor-ah4hlr42fk2bjlxp04hurvgv-3-0.jpg

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Fan blower blows cold and hot air


most likely a stuck heater tap,but may involve vacum or elec controlled trap doors in HVAC system

Mar 15, 2015 | 1999 Dodge Dakota

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My heater fan will not work.


BASE HVAC HAS BLOWER RELAY FOR HI ONLY
AND A RESISTOR FOR ALL OTHER SPEEDS
AUTO HVAC HAS BLOWER MODULE FOR CONTROL
CHECK ALL CONNECTIONS FOR CORRODED OR BURNT
TERMINALS. TEST POWER AND GROUNDS

Dec 27, 2013 | 2002 Chevrolet S-10

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1992 chevy C1500: Heat works on low speed, no medium, and high only works intermittantly.


On any other vehicle it sounds like the blower fan switch.
The fan switch provides power or ground to the resistor and there would be a high speed blower relay to bypass the resistor.
But in your case the fan switch is part of the controller.
I don't have a diagram for a 92 but the 94 model shows relays for low medium and high speeds. Each relay gets power from a fuseable link. The high relay gets power thru the low relay if the low relay is not engaged.
If you have the model with 3 relays you may need to check them.

Feb 01, 2013 | 1992 Chevrolet C1500

1 Answer

HVAC Fan Blower Problem


sounds like the blower motor needs to be replaced.

Sep 05, 2012 | 2001 Lincoln Town Car

1 Answer

Where is the blower motor? heater in car dosent blow. not under hood, cant get through glover compartment.


This work for 1998 Buick Century 3.1L SFI OHV 6cyl; the blower motor is a variable speed motor. The higher the voltage applied to the motor, the faster the speed. Depending on the HVAC (Heater Ventilation Air Conditioning) option installed in the vehicle, blower speed control could be through a set of resistors or through a solid-state blower motor control module.

In general, this system is reliable. Because so many of the control operations are electronic, special diagnostic equipment really should be used for system diagnostics and check-out. An authorized technician using a scan tool can most quickly locate HVAC problems.

zjlimited_78.jpg

Fig. Typical behind-the-instrument panel view of HVAC related components. Depending on the HVAC option, not all components are used on all vehicles (click for zoom)

zjlimited_79.jpg

Fig. Typical HVAC operation schematic

An inoperative blower motor could be caused by the following:

* Blown fuse(s). The fuse should be replaced. There may be both a LOW BLOWER and HIGH BLOWER fuse. Some models may also call it the HVAC fuse. Even the RADIO fuse is used in some applications. Check them all. If a fuse is blown there may be a short to ground in one of the power supply circuits.
* Open Circuit. Check the circuit between the ignition switch and the blower motor, and the blower motor ground circuit. Repair as necessary. * Faulty blower switch. A faulty blower switch should be replaced. * Most heater blower circuits also include a blower motor relay (look in the underdash convenience center), as well as a blow motor resistor. These items should be checked especially if the blower runs in one or two speeds, but not all speeds selected.

REMOVAL & INSTALLATION

  1. Disconnect the negative battery cable.
  2. The blower motor is located on the passenger side of the vehicle, under the instrument panel. Remove the right side sound insulator (trim panel) by removing the retainers and disconnecting the courtesy lamp.
  3. Detach the blower motor electrical connector. Some applications may have cooling hose to the motor which should be disconnected.
zjlimited_80.jpg

Fig. Blower motor and fan assembly removal

  1. Unfasten the blower motor mounting screws, then remove the blower motor from the vehicle.
  2. If the blower motor fan (also called a 'squirrel cage') must be replaced, use the following procedure:
NOTE Do not hammer on the motor to remove or install the fan. Do not apply force to the motor housing to seat the fan on the motor, or motor/shaft bearing damage could result. Do not apply pressure to the fan rim. Be sure the correct replacement part is used.
  1. Remove the metal star clip retaining the fan cage to the motor shaft.
  2. Remove the fan by pulling straight out.
To install:
  1. If removed, install the blower motor fan, as follows:
    1. Install the replacement fan cage onto the motor shaft.
    2. Adjust the fan cage to get a clearance of 0.30 inch (7.5mm) to the motor mount plate.
  2. Install the remaining components in the reverse of the removal procedure. Make sure the electrical connection is secure. Tighten the motor screws to 14 ft. lbs. (20 Nm).
  3. Connect the negative battery cable, then test the blower motor for proper operations


I hope this helps (remember to rate and comment this answer).

Nov 17, 2010 | 1998 Buick Century

1 Answer

2005 Jeep Grand Cherokee. Htr/AC fan switch only functions @ highest speed. At lower speed settings I can hear doors opening and closing---but not air.


replace the blower motor resistor. It controls the fan speeds. It defaults to high speed only when it fails.

How to replace the blower motor resistor block: Caution: Stay clear of the blower motor and resistor block (Hot). Do not operate the blower motor with the resistor block removed. 1. Disconnect and isolate the battery negative cable.
2. Remove the glove box from the instrument panel.
3. Pull out the lock on the blower motor resistor wire harness connector to unlock the connector latch.
4. Depress the latch on the blower motor resistor wire harness connector and disconnect the connector from the resistor.
5. Remove the two screws that secure the blower motor resistor block to the HVAC housing.
6. Remove the resistor block from the HVAC housing. Installation:
1. Position the blower motor resistor block into the HVAC housing.
2. Install the two screws that secure the resistor block to the HVAC housing. Tighten the screws to 2.2 Nm (20 in. lbs.)
3. Connect the wire harness connector to the resistor block.
4. Push in the lock on the blower motor resistor wire harness connecgtor to lock the connector latch.
5. Install the glove box.
6. Reconnect the battery negative cable.
7. Have a nice day!

Oct 11, 2010 | Jeep Cherokee Cars & Trucks

1 Answer

Saturn HVAC Blower Stopped Working


if the resistor card is bad you will only have setting 4 high on the blower and no other speeds, the resistor card is under the passenger side glove box by the center console way up there, i think its a phillips head,if i remeber right not too hard to get to,,, if no high speed then the fan motor is bad,thats under the wiper cowl under the hood,u gotta remove the wiper cowl to replace it

Jun 24, 2009 | 2000 Saturn L-Series

1 Answer

Air conditioner/heater blower fan on 1997 Buick Riviera not working. Regardless of whether it's on ''Auto'', Vent, Recirc, or Front Defrost button setting, even though I can see the fan level meter going...


it will be hard to diagnose with out having my hands on it but try this.

this vehicle is known for blower motor resistor failure.

under the dash on the passenger side next to the blower motor there is a resistor attatched to the blower motor case it will have a single plug with 5 or 6 wires in it, they are normally within a couple of inches of the blower motor, remove this resistor and look at closely for any signs of burning this is a common problem, you can buy one at any parts house, do not operate the motor with the resistor removed from its mounting hole or you will damage it.

if the resistor looks good than purchase you a test light and drop me a line and i will explain how to test the entire system its not hard to do.

wesleyschacht@hotmail.com

Jun 14, 2009 | 1997 Buick Riviera

1 Answer

Interior blower fan working intermittently.


sounds like ur blower resistor pack

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