Question about 1989 Cadillac Sedan DeVille

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My heater panel lights disappeared and a code of c or d would show up. and than the blower motor would come on at high.

I can reset by disconnecting the battery and reset the system, But that only lasts for a couple of hours.

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  • Cadillac Master
  • 15,478 Answers

Replace the BCM.

Posted on Nov 27, 2013

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Posted on Jan 02, 2017

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SOURCE: how do I check the heater blower motor to see if it is good?

take a test light and check the wires going to blower motor, at least one should light up, if so replace blower motor sounds like it is bad

Posted on Dec 19, 2008

  • 72 Answers

SOURCE: service charging system

You need to get an opinion from another repair shop. Look for one that is ASA certified.

Posted on Jun 22, 2009

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1 Answer

How to install a blower moter and fan


Well, here's the instructions from the service manual. The labor guide says this can be done in 1.6 hours...I don't see how, unless the instructions are wrong about having to remove the instrument panel. My thoughts are that if you are only doing the blower motor, the blower assembly will come out without pulling the dash. You probably only have to do a partial disassembly and remove the glove box and the glove box lower support.

*************************************************************************************

BLOWER ASSEMBLY

Removal and Installation

1. Disconnect battery ground cable. Remove Instrument panel. (See Instrument Panel Removal) Disconnect resistor connector. remove blower assembly duct. Disconnect motor connector. Remove blower assembly

2. Remove blower assembly screws and blower motor assembly. Remove clip and fan from assembly. Separate motor case and remove blower motor. To install, reverse removal procedure.



INSTRUMENT PANEL

Removal

1. Disable air bag system. See AIRBAG RESTRAINT SYSTEM article in ACCESSORIES/SAFETY EQUIPMENT SECTION. Disconnect negative battery cable. Scribe mating marks on steering wheel and shaft for installation reference. Using Steering Wheel Remover (J-29752) remove steering wheel. Remove steering cowl.

2. Remove instrument panel grilles and plug, or driving pattern indicator panel (A/T Models). Disconnect electrical connections. Remove instrument panel hood, instrument cluster ezel and instrument cluster. Remove hood release handle. Remove knee protector.

3. Remove dash fuse/relay block and side trim. Remove engine control module box. Remove radio console and glove box lower reinforcement. Remove speaker covers and glove box. Remove heater control panel knobs and cover. Disconnect heater control cables, and remove heater control panel. Remove illumination control knob. Remove instrument panel.

Installation

1. Install instrument panel. Install and adjust heater control cables. To complete installation, reverse removal procedure. Ensure mating marks on steering wheel and shaft align. Apply grease to contact ring and tighten steering wheel nut to 26 ft.lbs. (35 N.m).

Feb 28, 2011 | 1995 Isuzu Rodeo

1 Answer

No fan for the heater


First check the fuse for the blower motor in the fuse panel if it is blown replace it and see if blower works.If still not working you will need to buy a test light from your local auto parts store and check for voltage at the blower motor red wire if the test light shows voltage you might have a bad blower motor. There's a trick to test the motor called the tap test start the car and turn the heater fan on high using a mid size screw driver tap on the blower motor and see if it comes on if it does you need a new motor.

Dec 22, 2010 | 1996 Pontiac Grand Am

1 Answer

How do you change a heater blower moter in a 1998 Dodge grand caravan


Removal & Installation


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The blower motor is located behind the glovebox, behind the blower motor cover

  1. Disconnect and isolate the negative battery cable, then wait 2 minutes before proceeding with the removal. This will effectively disable the air bag system preventing possible personal injury.
  2. Remove the glove box from the instrument panel.
  3. Remove the A/C-heater blower motor cover.
  4. Disconnect the blower motor wiring connector.
  5. Remove the blower motor wiring grommet and feed the wiring through the blower motor housing.
  6. Remove the blower motor mounting screws.

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Once the cover is removed, unplug the electrical connector and push it through the opening in the housing


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The blower motor is secured to the housing with three small screws

  1. Allow the blower motor assembly to drop downward to clear the instrument panel and remove from vehicle.
To install:
  1. Place the blower motor assembly into position on the A/C-heater unit and tighten the mounting screws.
  2. Route the blower motor wiring through the blower motor housing and seat the wiring grommet in the hole of the blower motor housing.
  3. Reconnect the blower motor electrical connector.
  4. Install the A/C-heater blower motor cover.
  5. Install the glove box into the instrument panel.
  6. Reconnect the negative battery cable. Check blower motor operation.

May 24, 2010 | 1998 Dodge Caravan

2 Answers

My heater isnt blowing out any hot or cold air how do i fix problem if i hit blower motor sometimes it will kick on but onlt on high


The blower motor needs to be replaced. Also if it only blows on high the blower motor resister block may need to be replaced as well.

Feb 25, 2010 | 1997 Chevrolet C1500

1 Answer

How to replace heater core in a 1988 jeep cherokee?


Jeep Cherokee XJ Heater Core

Work for '92 models, but can use it like a reference guide.

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Figure 1

  1. Disconnect battery ground cable, then drain cooling system.
  2. Disconnect hoses from heater core.
  3. If equipped with A/C, remove evaporator/blower housing as follows:
    1. Discharge A/C system, then disconnect hoses from expansion valve.
    2. Disconnect electrical connector and vent tube from blower motor.
    3. Remove console, if equipped.
    4. Remove lower instrument panel attaching screws, then the lower panel.
    5. Disconnect electrical connections from A/C relay, blower motor resistors and A/C thermostat.
    6. Disconnect vacuum hose from vacuum motor.
    7. Cut evaporator/blower housing to heater core housing retaining strap, then disconnect heater control cable.
    8. Pry retaining clip from rear of blower housing flange, then remove the three retaining screws.
    9. Working from engine compartment, remove evaporator/blower housing attaching nuts, then the evaporator drain tube, Figure 1.
    10. Remove right kick panel, then the instrument panel support bolt.
    11. Pull right side of dash outward, then rotate housing downward and towards rear of vehicle until studs clear dash panel. Remove housing from vehicle.
  4. Remove heater core to housing retaining screws, then the heater core, Figure 2.
  5. Reverse procedure to install.
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Figure 2

Personally, I'd pressure test the cooling system then look at the heater core to see if it leaks. It may just be a loose clamp or leaky hose.

Also can check the forum jpmagazine.com

I hope help you; good luck (remember rated this).

Sep 15, 2009 | Jeep Cherokee Cars & Trucks

1 Answer

Blower motor doesn't blow anymore, This blows


If it blows only on high speed, it is the resister.
If it does not work at all, check fuses first. See owner manual for location.
Then check blower motor by jumping 12 volts from battery to blower motor. Make sure ground is jumped too.

If it works now, it's the control panel. If not, it is the motor.

Blower Motor —Front Removal and Installation
  1. Prepare the vehicle for blower motor (19805) removal.
    1. Disconnect the battery ground cable (14301). For additional information, refer to Section 414-01 .
    1. Remove the air cleaner assembly. For additional information, refer to Section 303-12 .
  1. Detach the speed control servo.
    1. Disconnect the electrical connector.
    1. Remove the bolt.
    1. Position the speed control servo aside.
  1. Position the coolant expansion tank/windshield washer reservoir aside.
    1. Remove the screws and the nuts.
    1. Position the coolant expansion tank/windshield washer reservoir aside.
  1. Remove the blower motor.
    1. Disconnect the vent hose.
    1. Disconnect the electrical connector.
    1. Remove the four screws.
    1. Remove the blower motor.
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Also,

Heater Blower Motor Switch Resistor(s)
The front heater blower motor switch resistor has the following features:
  • The assembly is located in the engine compartment on the evaporator housing (19850) next to the blower motor assembly (19805).
  • Three resistor elements are mounted on the resistor board to provide four blower motor speeds.
  • Depending on the heater blower motor switch position, series resistance is added or bypassed in the A/C blower motor circuit to decrease or increase A/C blower motor speed.
  • An overheating device (thermal limiter) will open the resistor coil circuit when the temperature reaches 121°C (250°F), interrupting the blower motor operation in all speeds except high.
  • The thermal limiter cannot be reset and is not serviceable.

Aug 10, 2009 | 2001 Ford Explorer Sport

2 Answers

'05 Freestyle Heater/AC blower only works on high(4). How do I get at the switch or blower motor. Everything is plastic! Does anyone have a solution? Thanks, Bob.


here is what my book says:
Blower Motor Speed Control To Remove:
  1. Remove the right lower instrument panel insulator.
  2. Disconnect the electrical connector from the blower motor speed control.
  3. Remove the blower motor speed control mounting screws.
  4. Remove the blower motor speed control.

Jul 06, 2009 | 2005 Ford Freestyle

1 Answer

I have a 2000 ford E350 van with front and rear air. the front blower motor runs at low speed, The front blower still runs on low even when the knob is set on medium or high. I do not know where the...


it's either the blower motor switch or blower motor resister. Resistor ?Heater Blower Motor Switch Removal Remove the battery (10655) ; refer to Section 414-01 . Remove the battery tray. Remove the screws. Remove the battery tray. Disconnect the heater blower motor switch resistor connector. Remove the heater blower motor switch resistor (18591). Remove the two screws. Remove the heater blower motor switch resistor. ----------------------------------- Switches Removal Disconnect the battery ground cable. Remove the center trim panel; refer to Section 501-12 . Remove the control assembly. Remove the screws. Remove the control assembly. Remove the A/C-heater function selector switch knob. Disconnect the vacuum harness connector. Disconnect the A/C-heater function selector switch connector. Remove the A/C-heater function selector switch. Remove the screw. Remove the A/C-heater function selector switch. Remove the temperature control switch knob. Disconnect the temperature control switch connector. Remove the temperature control switch. Remove the screw. Remove the temperature control switch. Remove the heater blower motor switch knob. Disconnect the heater blower motor switch connector. Remove the heater blower motor switch (18578). Remove the screw. Remove the heater blower motor switch. ----------------------------

Mar 31, 2009 | 2007 Ford E-350 Super Duty Length XLT

1 Answer

How to remove a blower motor


1.) remove screw from right door sill trim plate, (that piece of trim that covers the edge of the carpet when the door is open) 2.) remove right hinge pillar trim panel (passenger side kick panel) 3.) disconnect blower motor electrical connectors 4.) remove blower motor cover 5.) disconnect the cooling tube (rubber hose that attaches to the motor ) .6.) loosen courtesy light screws and move light out of way (if equipped) 7.)remove right side dash support bolt (under dash twist your head around like the excorsist, , lol , where the dash meets the side panel pillar) 8.)remove blower motor-to-case screws 9.) remove blower 10.) remove fan from blower motor shaft 11.) to install reverse removal procedure ,.. not as bad as it sounds , cheers.

Jan 10, 2009 | 1992 Chevrolet K1500

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