Cadillac
 

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds

Cadillac Technical Archive | Cadillac Dealers | Cadillac Reviews | Cadillac Dealer Reviews | Cadillac Vendors

Results 1 to 11 of 11

Thread: 2002 STS - HVAC blower motor resistor pack

  1. #1
    Silver66 is offline Cadillac Owners Member
    Automobile(s): 2002 STS, 2007 F250 Super Duty
    Join Date
    Aug 2013
    Location
    Fort McMurray, AB
    Age
    51
    Posts
    11

    2002 STS - HVAC blower motor resistor pack

    Does anyone know where to find the "Blower Motor Resister" in the 02 STS?
    I have a feeling it's behind the glove box thus needing to remove that to get at it.


  2. Remove Advertisements
    CadillacForums.com
    Advertisements
     

  3. #2
    Submariner409's Avatar
    Submariner409 is online now If it won't run, chrome it
    Automobile(s): 2002.5 F55 STS - 67,500 miles, 2014 Explorer XLT FWD
    Join Date
    Feb 2006
    Location
    MD Eastern Shore, Kent Island
    Age
    77
    Posts
    56,813

    Re: 2002 STS - HVAC blower motor resistor pack

    It's on top of the wiring pack under the flat wood part of the console - just in front of the shift stick.

    Pull straight up on the shift knob - it will pop off and smash your face. Carefully begin lifting the console wood trim from the rear edge. The resistor pack has a 4 or 5 pin connector that sticks straight up.

  4. #3
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with DTS floor shift)
    Join Date
    Jun 2004
    Location
    Woodstock Ill.
    Age
    69
    Posts
    82,262

    Re: 2002 STS - HVAC blower motor resistor pack

    I thought the blower speed was PWM controlled and resistors where done away with years ago. Color me confused.

  5. #4
    Submariner409's Avatar
    Submariner409 is online now If it won't run, chrome it
    Automobile(s): 2002.5 F55 STS - 67,500 miles, 2014 Explorer XLT FWD
    Join Date
    Feb 2006
    Location
    MD Eastern Shore, Kent Island
    Age
    77
    Posts
    56,813

    Re: 2002 STS - HVAC blower motor resistor pack

    Right out of the Helm manual, and the resistor pack is available at RockAuto or from Chris at Rippy.

    The resistor trace circuit board itself sticks down into the blower airstream and I would guess the electronically controlled speed selector switches different resistors in and out of the speed circuit.

  6. #5
    JimD is offline Cadillac Owners Connoisseur
    Automobile(s): '98 STS (RIP @ 206,xxx miles)
    Join Date
    Sep 2003
    Location
    Metro ATL
    Posts
    4,854

    Re: 2002 STS - HVAC blower motor resistor pack

    Quote Originally Posted by Ranger View Post
    I thought the blower speed was PWM controlled and resistors where done away with years ago. Color me confused.
    PWM speed control applies to the front seat area blower motor. The rear seat (auxiliary) blower motor speed is determined by resistors.

  7. #6
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with DTS floor shift)
    Join Date
    Jun 2004
    Location
    Woodstock Ill.
    Age
    69
    Posts
    82,262

    Re: 2002 STS - HVAC blower motor resistor pack

    Ahh, now THAT makes sense. Thanks Jim.

  8. #7
    Submariner409's Avatar
    Submariner409 is online now If it won't run, chrome it
    Automobile(s): 2002.5 F55 STS - 67,500 miles, 2014 Explorer XLT FWD
    Join Date
    Feb 2006
    Location
    MD Eastern Shore, Kent Island
    Age
    77
    Posts
    56,813

    Re: 2002 STS - HVAC blower motor resistor pack

    How 'bout that ????

    Now we need to differentiate between the "HVAC blower" PWM controls and the "Auxiliary blower" resistor pack. I went into the online manual and it took me to the "blower resistor assembly".

  9. #8
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with DTS floor shift)
    Join Date
    Jun 2004
    Location
    Woodstock Ill.
    Age
    69
    Posts
    82,262

    Re: 2002 STS - HVAC blower motor resistor pack

    Now that makes me wonder why they used two different methods for controlling fan speed. I always assumed that there was some type of advantage in moving from resistors to PWM. If that's the case, why didn't they use that for both? Still somewhat confused , but less than before .

  10. #9
    JimD is offline Cadillac Owners Connoisseur
    Automobile(s): '98 STS (RIP @ 206,xxx miles)
    Join Date
    Sep 2003
    Location
    Metro ATL
    Posts
    4,854

    Re: 2002 STS - HVAC blower motor resistor pack

    Quote Originally Posted by Ranger View Post
    Now that makes me wonder why they used two different methods for controlling fan speed.
    The front seat temperature control has an AUTO function that can include fan speed. Allowing the AUTO setting to determine where the air is directed and at what speed, the HVAC control module can minimize temperature differences between the floor and the windshield. Cadillac comfort. Using PWM for blower motor speed control gives the HVAC control module an infinite number of speed settings instead of the 3 or 4 or ?? fan speed settings on a switch. Cadillac comfort without a drafty fan blowing in your face or on your feet.

    The rear seat passengers do not have the luxury of an AUTO function; they have to live with what they can get.

  11. #10
    Submariner409's Avatar
    Submariner409 is online now If it won't run, chrome it
    Automobile(s): 2002.5 F55 STS - 67,500 miles, 2014 Explorer XLT FWD
    Join Date
    Feb 2006
    Location
    MD Eastern Shore, Kent Island
    Age
    77
    Posts
    56,813

    Re: 2002 STS - HVAC blower motor resistor pack

    Good info. Thanks.

    ........... I hope the OP really wanted "blower motor resister". I have both circuit diagrams if necessary.

  12. #11
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with DTS floor shift)
    Join Date
    Jun 2004
    Location
    Woodstock Ill.
    Age
    69
    Posts
    82,262

    Re: 2002 STS - HVAC blower motor resistor pack

    Ahh, the difference between first class and coach. Makes sense. Thanks Jim.


Bookmarks

Cadillac Posting Rules

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Read about Lincoln | Buick | Kia Forte Forum