Soft Button EATC to Round Button EATC

Discussion in 'Gen 1 & 2 - Guides (For How-to guides, NOT how-to ' started by the4biddendonut, Apr 1, 2010.

  1. the4biddendonut

    the4biddendonut Hurry up meow.

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    I'm sure we've all seen the old, ugly, broken button climate controls we've all come to call the soft button EATC. This How-To guide will show you how to modify your ugly soft button EATC into a nice looking Round button EATC.

    First, you will need a soft button EATC from a 93 or newer. If you can't tell if yours is going to work or not, you can count the number of wires that are in the 2 ribbon cables that go from the main circuit board to the face. There should be 8 wires in each cable.

    You will also need a round button EATC. They're commonly found in Continentals, Grand Marquis, Crown Victorias and other cars.

    [​IMG]

    You'll also need the following tools:
    -1/4" and 3/16" Socket
    -T6 Torx
    -Soldering Iron
    -Desoldering Iron or Desoldering braid
    -Solder
    -Utility Knife
    -Pick tool (not necessary, but comes in handy)

    [​IMG]


    Soft button EATC

    1) Start by removing the 4 screws on the back of the Soft button. Two 1/4" and two 3/16" screws.

    [​IMG]

    2) Remove the cover.

    [​IMG]

    3) Unclip the face. A pick tool comes in handy here.

    [​IMG]

    4) Now the guts can all slide out the front.

    [​IMG]

    5) Unplug the Vacuum Solenoid connector from the circuit board. Set aside the Solenoids, they will be used later.

    [​IMG]

    6) Unplug the blower motor speed control dial from the circuit board (right). Cut or desolder where the illumination wires connect to the board (left), they will not be used later.

    [​IMG]

    7) Remove the illumination bulb holder and face. They should come off very easily.

    [​IMG]

    8) Desolder the two ribbon cables from display circuit board, not at the main board. This will make it easier later, you will see why.

    Hint: Find an electronic device that you don't want anymore and practice desoldering on it for practice.

    [​IMG]

    9) This is what you will keep from the soft button EATC. The main board and the vacuum solenoid unit. The rest of my soft button unit ended up in garbage can.

    [​IMG]


    Round Button EATC


    10) Now we'll work on the round button EATC. Start by removing the four screws on the back. Again, there are two 1/4" and two 3/16" screws.

    [​IMG]

    11) Remove the cover. Then, slide the guts out. Keep the plastic cover and case, they'll be used again.

    [​IMG]

    12) Unplug the vacuum solenoid unit from the main board and lift out. This unit will not be used, so mine went in the garbage.

    [​IMG]

    13) Unplug the blower motor speed control dial from the main board.

    [​IMG]

    14) Remove the five screws holding the display circuit board to the face with a T-6 Torx.

    [​IMG]

    15) Remove the face and rubber button pad from the display circuit board, keep these.

    Now would be a good time to clean the face of you round button EATC because you can pop the buttons out the front by pushing them from the back. You can also replace the bulbs with ease.

    [​IMG]

    16) Desolder the two 8 wire ribbon cables from the display circuit board. Keep the display circuit board.

    [​IMG]


    Assembly


    17) In this picture you can see why we removed the ribbon cables from the display circuit board. The ribbon cable on the left is from the soft button and the wider one is from the round button. It will be easier to solder because connections on the display board are further apart.

    [​IMG]

    18) To get the more narrow cable to fit into the round button display circuit board, slice in between the wires inside the ribbon cable with your utility knife. Then, spread the wires out a little bit.

    [​IMG] [​IMG]

    19) Now the ribbon cable from the soft button and round button display circuit board are ready to be soldered together. Be conservative with your solder, it doesn't take much. These connections cannot touch, or it won't work properly.

    [​IMG]

    20) Finished soldering.

    [​IMG]

    21) Replace rubber button pad onto the display circuit board and fasten board to the face with the five T-6 Torx screws.

    [​IMG]
     
    Last edited: Apr 1, 2010
  2. the4biddendonut

    the4biddendonut Hurry up meow.

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    22) Plug blower motor speed dial into main circuit board.

    [​IMG]

    23) Slide the main circuit board into the round button EATC case.

    [​IMG]

    24) Plug the vacuum solenoid unit from the soft button into the main board and place the unit into place.

    [​IMG]

    25) Replace the cover from round button unit. Reinstall the two 1/4" screws and two 3/16" screws.

    [​IMG]

    26) Test before installation. Make sure all your buttons work correctly and that the illumination works. If a button doesn't work, you'll have to go back and check your solder joints. It's no fun going back, so do it right the first time.

    Great success! It works like it should.

    [​IMG]
     
    Last edited: Apr 1, 2010
  3. hawkeye18

    hawkeye18 Sorta cares

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    This makes me very happy, and very sad.

    Very happy because this is an EXCELLENT write-up, and is very well written.

    Very sad because I remember when the last one of these was written! Not everything lives forever on the internet, it seems. I hope this one lasts longer.
     
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  4. bottonic

    bottonic Sho Junkie

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    Nice Write-up! Thank you! :thumb:
     
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  5. jonheese

    jonheese Know-It-All

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    Excellent write-up.

    Small correction: I think the pic for step 23 is a dupe.
     
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  6. the4biddendonut

    the4biddendonut Hurry up meow.

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    So you're right. Fixed now.
     
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  7. jonheese

    jonheese Know-It-All

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    Excellent. Thanks
     
  8. mattsho1993

    mattsho1993 SHO owner

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    can we get a pic of it together?
     
  9. the4biddendonut

    the4biddendonut Hurry up meow.

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    I haven't had time to put it all back together. I'll get a picture when I get it installed into the dash of my 91 tomorrow morning.

    In the mean time, here's a picture from my 93.

    [​IMG]
     
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  10. hawkeye18

    hawkeye18 Sorta cares

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    I don't see any nudity here. :rant: :madflame:
     
  11. the4biddendonut

    the4biddendonut Hurry up meow.

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    Well, it got you to look at the thread, right?
     
  12. hawkeye18

    hawkeye18 Sorta cares

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    lol shuddup
     
  13. the4biddendonut

    the4biddendonut Hurry up meow.

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    Here's a picture of the EATC in the write up installed into my 91. Try to see past all the dust.

    [​IMG]
     
  14. Phoenix

    Phoenix SHOHOLIC

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    I vote for a sticky.
     
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  15. biker889

    biker889 SHO Member

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    Was that in the car when you got it? did you buy that car locally?
     
  16. the4biddendonut

    the4biddendonut Hurry up meow.

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    No, it didn't come with that EATC. I modded it and installed it. Yes, I did buy it locally.
     
    Last edited: Apr 2, 2010
  17. moobypets

    moobypets mooby

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    ok my question his my car is a 90

    witch year range eatc will fit this 90 93 95 ??

    im confused and im sure i could find a eatc for cheap but i just need to knwo wich year will fit or replace mine
     
  18. SuperHO

    SuperHO Mental Patient

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    lack of nudity notwithstanding, why not just swap the faceplate?
     
  19. bully06

    bully06 SHO Member

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    Excellent write up! Very detailed, I will have to try this on my 93.
     
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  20. green95

    green95 green95

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    Was there a certain year for this style? The reason I ask is that your Round Button EATC has: MAX A/C, VENT, and the other buttons. The Round Button EATC that I'm looking at has: MAX A/C, NORM A/C, VENT, and the other buttons. It looks like the PANEL/FLOOR button is not on this EATC. I'm guessing it won't work, so what year did yours come from. The one I found is from an 2005 Grand Marquis.
     

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