Rear Defroster Tab Popped off rear glass
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Cadillac Escalade, EXT and ESV Forum - 2007-2014 Discussion, Rear Defroster Tab Popped off rear glass in Cadillac Escalade Forums; I have read where this has been an Issue on line. I have heard people reference a TSB but I ...
  1. #1
    SJG
    SJG is offline Cadillac Owners Member
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    Rear Defroster Tab Popped off rear glass

    I have read where this has been an Issue on line. I have heard people reference a TSB but I am unable to find one.

    I have an appointment at the dealer for the 2nd week in September and I would like to review the TSB before my wife brings it in for service.

    I was told it would be covered by a TSB if one was issued or my warranty if under 50K. I am at 48+K now. Unless is shows abuse. There was no abuse but I would like to have the TSB in hand all the same.

    Thanks as always for the guideance

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    Cadillac Cust Svc's Avatar
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    Re: Rear Defroster Tab Popped off rear glass

    Quote Originally Posted by SJG View Post
    I have read where this has been an Issue on line. I have heard people reference a TSB but I am unable to find one.

    I have an appointment at the dealer for the 2nd week in September and I would like to review the TSB before my wife brings it in for service.

    I was told it would be covered by a TSB if one was issued or my warranty if under 50K. I am at 48+K now. Unless is shows abuse. There was no abuse but I would like to have the TSB in hand all the same.

    Thanks as always for the guideance
    Hello SJG,

    I would be happy to run your VIN through our system to see if you have any open recalls or coverages pertaining to this issue. TSB’s are service bulletins that are sent to the dealerships to assist the technicians on how to make some of the repairs. They do not offer any coverage and I unfortunately do not have access to any of them. Please private message or reach out to me at socialmedia@gm.com with your VIN and I would be happy to look into this for you. If you send an email, please include "ATTN GREG" in the subject line so that it gets delivered straight to me. Please keep us updated in regards to the visit with the dealership as well. Thank you very much for your time.

    Gregory W.
    Cadillac Customer Care

  4. #3
    wwceaton is offline Cadillac Owners Member
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    Re: Rear Defroster Tab Popped off rear glass

    INFORMATION

    Bulletin No.: 04-08-48-001D

    Date: April 17, 2012

    Subject: -Rear Window Defogger Broken Heating Grid Detection Method
    Models:
    2013 and Prior GM Passenger Cars and Light Duty Trucks
    Supercede:
    This bulletin is being revised to add the 2013 model year and change the recommended repair. Please discard Corporate Bulletin Number 04-08-48-001C (Section 08 - Body and Accessories).

    The addition of vertical grid lines to the heated back window defogger circuits has made it difficult to detect broken defogger grid lines. In the past, it was a simple matter to use a voltmeter to check the continuity of each grid line in order to locate a non-functional line. Some new design back windows have two vertical grid lines that connect all of the horizontal grid lines together, thereby providing alternate routes for the electrical current to follow. This makes the old test method ineffective. If the vehicle does not have the vertical lines, the old (line-by-line) test methods can be used.

    Materials Required

    - A small ball of fine steel wool Type 00, or

    - Optional - A strip of liquid crystal heat sensitive paper, 51 mm x 305 mm (2 in x 12 in) or similar size (Contact Edmund Scientific at 800-728-6999 for part number CR30723-70 or go to www.scientificsonline.com), or

    - Optional - A portable infrared thermometer


    Correction

    There are three distinct zones across the back window that must be checked. They are:

    - the driver's side outboard of the two vertical lines

    - the passenger side outboard of the two vertical lines

    - the central zone that falls between the two vertical lines


    To detect a broken grid line in any of the above three zones and to isolate the exact location of the break, perform the following steps:

    Caution

    - Approved safety glasses and gloves should be worn when performing this procedure to reduce the chance of personal injury.

    - Cover the rear shelf area to prevent damage to the interior trim material.

    1. Start the engine and turn on the back window defogger.

    2. Take the ball of fine steel wool and twist one end to a point. Move the point slowly across each grid line. Be sure to start at the far side of the zone and move it to the opposite side of the zone. When you bridge the grid line break with the steel wool, you will see a small spark. Repeat the test over the same area to be sure you have accurately located the break. Mark the exact location of the grid line break. Repeat this portion of the test for each grid line. If you do not see a spark at any point, it is possible that there are two breaks in the same line and zone. Close visual inspection using a magnifying glass may be the only way to locate breaks in this case.

    3. The following are provided as an alternative way to detect a non-functional grid line. If available, use in addition to the steel wool.

    1. Method using liquid crystal heat sensitive paper:
    Important
    The first part of the test must be completed quickly before the entire surface of the back window becomes warm.

    1. From outside the vehicle, place the heat sensitive paper (dull surface in contact with the glass) against the top driver side grid line. Start the engine and turn on the back window defogger. A distinct color change will take place at each conductive grid line. Repeat for the bottom grid lines until they have all been checked in the driver side zone.

    2. Repeat the process for the passenger side and center area zones.

    3. If no color change is noted for a grid line, place a crayon or china marker check mark beside it. Mark each grid line in the zone where it is non-conductive and, therefore, not heating up. More than one broken grid line may be found.


    2. Method using portable infrared thermometer:

    1. Start the engine and turn on the rear back window defogger.

    2. From inside the vehicle, start at the top driver side grid line and slowly run the portable infrared thermometer vertically down the rear window contacting each grid line. You should be able to see a district variation in temperature readings.

    3. Mark each grid line in the zone where it is non-conductive and, therefore, not heating up. More than one broken grid line may be found.

    4. Repeat the process for the passenger side and center area zones.



    4. If a broken defogger grid is detected, the recommended repair is rear window replacement.









    Disclaimer

    © 2013 ALLDATA LLC. All rights reserved. Terms and Conditions

  5. #4
    kazza93203's Avatar
    kazza93203 is offline Cadillac Owners Fanatic
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    Quote Originally Posted by SJG
    I have read where this has been an Issue on line. I have heard people reference a TSB but I am unable to find one.

    I have an appointment at the dealer for the 2nd week in September and I would like to review the TSB before my wife brings it in for service.

    I was told it would be covered by a TSB if one was issued or my warranty if under 50K. I am at 48+K now. Unless is shows abuse. There was no abuse but I would like to have the TSB in hand all the same.

    Thanks as always for the guideance
    That TSB is for the lines going across the glass and not the actual tabs. Some dealers repair it but do fail again. Some dealers replace the whole back glass.

  6. #5
    franknitty69's Avatar
    franknitty69 is offline Cadillac Owners Member
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    Re: Rear Defroster Tab Popped off rear glass

    mine just popped off too. it's broken where it is 'soldered' to the defroster strips.

  7. #6
    Suicidalbob is offline Cadillac Owners Member
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    I think I read there is a high temp adhesive you can try. Ill look for the thread.

  8. #7
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    Re: Rear Defroster Tab Popped off rear glass

    Quote Originally Posted by franknitty69 View Post
    mine just popped off too. it's broken where it is 'soldered' to the defroster strips.
    Hello franknitty69,

    I am sorry to hear that you are experiencing this issue with your Escalade’s rear defroster tab as well. If you are thinking about taking your vehicle into your dealership so they can look into this concern for you, I would be more than happy to assist you in working with them. Please feel free to private message me if you would like to further discuss this concern. Thank you very much for your time.

    Gregory W.
    Cadillac Customer Care

  9. #8
    hrpatel17926 is offline Cadillac Owners Fanatic
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    Mine did it 2x, take the glass off easy to do, then resolder tab back on tpu will need a high temp gun 1000 watts or better, let glass get to room temp. No adhesives will stick for long periods of time. It will do it again and again even with new glass.

  10. #9
    Suicidalbob is offline Cadillac Owners Member
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    I remember now.. there's a tsb for this that I read. Maybe Gregory could dig one up for us to read..

  11. #10
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    Re: Rear Defroster Tab Popped off rear glass

    Quote Originally Posted by Suicidalbob View Post
    I remember now.. there's a tsb for this that I read. Maybe Gregory could dig one up for us to read..
    Hello Suicidalbob,

    I apologize, but unfortunately I do not have access to TSBs and am unable to look up them up. I would be more than happy to contact the dealership and see if they have any information on a TSB for this issue. Technical Service Bulletins do not offer any coverage and are just instructions for the technicians at the dealerships in regards to specific issues. Thank you very much for your time.

    Gregory W.
    Cadillac Customer Care

  12. #11
    the blur's Avatar
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    Re: Rear Defroster Tab Popped off rear glass

    This just happened to my Escalade. 2 glass shops told me to replace the glass. The dealer said he can solder it back on. We never even open the upper section of glass, so it's just a poor design.

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