I could use a bit of direction/help...
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RWD 19xx-1984 DeVille and Fleetwood,
1985-1996 Fleetwood and Brougham Forum Discussion, I could use a bit of direction/help... in Past Cadillac Vehicle Discussion; I have a '79 Deville, and a few weeks ago my horn started going off when I'd use my blinker. ...
  1. #1
    mrbusto71 is offline Cadillac Owners Member
    Automobile(s): 1979 DeVille d'Elegance
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    I could use a bit of direction/help...

    I have a '79 Deville, and a few weeks ago my horn started going off when I'd use my blinker. I started using hand signals, but today my horn started blaring when I'd turn right, and when I got home the damn thing wouldn't shut off. I finally got it to be quiet, but I'd like to figure out how to disconnect the horn before I go to work tomorrow. Problem is, the service manual I have is for a '77 Eldorado, and while similar, they're not identical.

    On a scale of 1 to 10, my car literacy is like, a 2. I know how to add oil and rotate tires. That's the extent of my car knowledge. Could anyone give me (hopefully simple) instructions on how to disconnect the horn? I opened the hood to look for the horn, but I don't know the difference in appearance between the horn, alternator, distributor or anything else, so I didn't wanna just start unpluggin stuff. I also checked for the fuse box (I looked under the steering wheel in the cabin) but didn't find anything like I'm used to seeing on newer cars.

    Any help at all would be PHENOMENAL. Thanks guys.

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  3. #2
    77CDV's Avatar
    77CDV is offline Cadillac Owners Master
    Automobile(s): 77 CDV, 06 DTS III, 69 FWB
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    Re: I could use a bit of direction/help...

    The easiest way is to remove the horn relay. It located behind the e-brake pedal with the blower relay, antenna relay, seat belt and key buzzer. It's the small square one on the right.

    The cause of your problem would seem to be that the horn wire inside the steering column has worn through and is making contact with the metal in the column, causing a completed circuit and sounding the horns. You'll need to open the column to correct the problem properly.

  4. #3
    mrbusto71 is offline Cadillac Owners Member
    Automobile(s): 1979 DeVille d'Elegance
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    Re: I could use a bit of direction/help...

    K, I went down to my car, got under the drivers side and looked behind the e brake pedal. I'm still not sure what I'm looking at (again, I'm sorry, I sincerely know nothing about cars ). I'm attaching a photo so I can get a bit more guidance if you don't mind. Is it that white square on the left? Or is it one of the metal things somewhere on the right?1234.jpg

  5. #4
    77CDV's Avatar
    77CDV is offline Cadillac Owners Master
    Automobile(s): 77 CDV, 06 DTS III, 69 FWB
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    Re: I could use a bit of direction/help...

    The plastic covered one on the left.

    Love the d'Elegance carpet!

  6. #5
    sven914 is offline Cadillac Owners Connoisseur
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    Re: I could use a bit of direction/help...

    It's really a simple fix; just need to have someone pull the wheel off and replace that one wire. It shouldn't cost more than a $100 to get done, and pretty much any type of garage can do it.

  7. #6
    The Ape Man's Avatar
    The Ape Man is offline Cadillac Owners Connoisseur
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    Re: I could use a bit of direction/help...

    The entire turn signal switch should be replaced. It has the pigtail and connection already included with the replacement part.

    The job requires a few speciality tools.

  8. #7
    j2rossit is offline Cadillac Owners Enthusiast
    Automobile(s): 85 FW Brougham, 68 Wildcat 'vert, 92 & 96 Roadmaster Wagons
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    Re: I could use a bit of direction/help...

    I had the same problem, it didn't take me vary long to fix it, but I did have to borrow the specialty tools from the local part store. If you do decide to take it apart yourself and don't have confidence, take pictures as you go to remind you of where things go. A telescoping steering wheel makes it harder than the none telescoping since there is a shaft that has a few little pieces that fall out when you take it apart.


    And a note if you try it yourself: The wire that connects to horn pad to the inside of the column can be disconnected by grabbing the end connected to the column, pressing it in and twisting.

    Also look for any debris floating around in your column that could cause problems later. I had a little broken piece of metal floating around in there that was shoring out the hazard lights sometimes, and sounding the horn others.

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