Missing Under Dash Relays Purpose
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Cadillac DeVille 1985 to 2005 including:
1985-1992 Fleetwood, 1993 Sixty Special, All FWD Forum Discussion, Missing Under Dash Relays Purpose in Past Cadillac Vehicle Discussion; Friends, What are the missing relays for, I have a 1987 Coup DeVile that have two of the ten relays ...
  1. #1
    xMikeDoex is offline Cadillac Owners Member
    Automobile(s): 1987 DeVile
    Join Date
    Jun 2013
    Age
    56
    Posts
    1

    Missing Under Dash Relays Purpose

    Friends, What are the missing relays for, I have a 1987 Coup DeVile that have two of the ten relays missing . The fuse box with the missing relays is under the dash on the passengers side, it houses eight fuses and ten relays.
    See pix
    20130623_143429.jpg
    20130623_143413.jpg

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  3. #2
    r_2016's Avatar
    r_2016 is offline Cadillac Owners Fanatic
    Automobile(s): 2005 Lexus LS430, 1993 Deville
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    Sep 2005
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    Boston, MA
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    Re: Missing Under Dash Relays Purpose

    I am not sure about the 87 Deville, but on my 93 Deville I believe the horn relay is under the dash and also the door lock relay might also be under there. Is anything not working; horn, doorlocks, alarm, keyless entry?

  4. #3
    aeronca36606 is offline Cadillac Owners Enthusiast
    Automobile(s): 85 Coupe Deville 4.1 V8 & 4.3 V6 Deisel & 1970 Eldorado
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    East Tennessee
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    Re: Missing Under Dash Relays Purpose

    It is normal for some of these relays to not be there. Each car can have different options. Some of these options would require an additional relay. California emmission spec could also have an additional relay. Your owners mqanual has the relays listed and there purpose. I do not have an 87 owners manual or i would look for you. On my 85 Coupe Deville's the gas and diesel versions have very different relay layouts. As long as everything works i wouldn't worry about it.

  5. #4
    5m0k3y is offline Cadillac Owners Member
    Automobile(s): 1989 Sedan DeVille
    Join Date
    Jun 2013
    Location
    Osceola, Nebraska
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    5

    Re: Missing Under Dash Relays Purpose

    Did you remove the panel under the dash to get to them or was it already gone? My 89 has a sticker on that panel on the inside with pictures or hieroglyphs trying to explain what each is for, I also have the owners manual and it deciphered them much better, including the bit about some relays not being there after a mid year change.

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