Key buzzer to chime

Electrical and Ignition

  1. crewchief

    crewchief A & P Mechanic

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    Are there any other options for the OEM key buzzer on a 73 Duster? I would prefer to listen to a chime rather than an annoying buzzer. Any suggestions?
     
  2. ScampMike

    ScampMike Despicable Damn Yankee FABO Gold Member

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    turn the radio up...? :lol: sorry, HAD to... I am sure there is a way - it's a simple little 12v doohicky.. look up chime module
     
    Last edited: Oct 18, 2016
  3. crewchief

    crewchief A & P Mechanic

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    I know you had to, I left it wide open. Trouble is the buzzer is also the horn relay and not sure if Chrysler had a new version that gave you a chime and horn relay hook up.
     
  4. ScampMike

    ScampMike Despicable Damn Yankee FABO Gold Member

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    this?

    s-l1600.jpg
     
  5. crewchief

    crewchief A & P Mechanic

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  6. ScampMike

    ScampMike Despicable Damn Yankee FABO Gold Member

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    right - what I am thinking is there has to be two leads for the key buzzer and two for the horn - figure out which is which and re-wire it to a chime module...
     
  7. crewchief

    crewchief A & P Mechanic

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    Mine is this one "A-Body Horn Relay and Key Buzzer PN 3579205
     
  8. ScampMike

    ScampMike Despicable Damn Yankee FABO Gold Member

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    never done it but I still think it's totally possible..
     
  9. superchargeddrt

    superchargeddrt Well-Known Member

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    You could easily adapt a generic driving light relay to use as a horn relay and then find a chime module.
     
  10. DionR

    DionR Well-Known Member

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    Good idea! I dislike the buzzer in my Duster, but never even thought about how other cars have a chime instead. I like it!

    Now to figure out how to get it to chime when the light get left on, too. :D
     
  11. 72Valiant4Door

    72Valiant4Door Trouble Maker

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    I am about to do this as well.
     
  12. crewchief

    crewchief A & P Mechanic

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    Ok guys, how do we go about this. When did the chime system come about? The next car I owned was a 78 Volare, but can't rmember what sound it made with the key in.
     
  13. DionR

    DionR Well-Known Member

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    Did a little bit of research last night but wasn't able to come up with anything very promising.

    Couldn't tell you when they started to use a chime. And I wonder if at first it didn't use the radio speakers to do so. I did find a box that at least looked small enough to work, from a Ford Thunderbird and others, but didn't look into how it worked (speculating it used the speakers). Found some info on a Chevy truck site about disabling it, and they talked about it being in the middle of a circuit board. Doesn't sound like that setup used the radio speakers to make the chime sound, but it didn't sound like a good retrofit, either.

    Funny thing is, most of what I found were people asking how to disable the chime. And here we are talking about how to retrofit it. :)
     
  14. crewchief

    crewchief A & P Mechanic

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    Thanks for the intel and your investigation. You're right about people looking to disable the chime. I like to have some sort of warning before locking the keys inside, besides that load annoying buzzer. Some Chrysler engineer came up with that one just to drive people crazy.
     
  15. DionR

    DionR Well-Known Member

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    FYI, here is a link to one of the Ford modules I found Door Chime Module - E7DB-10D840-AA - 1989 - 1997

    Looks to be something that came in a bunch of different fords. Found it listed for mustangs as well as the listed models in the link.

    Here is a link to a page where some one took one apart and fixed it. http://www.allfordmustangs.com/foru...me-module-howtorefurbish89to91chimemodule.pdf

    Based on the above, looks like it doesn't interface with the radio speaker, so that might make it easier. But haven't looked at wiring diagrams to trace it out and figure out if it could be wired in.
     
  16. DionR

    DionR Well-Known Member

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    This appears to give some more input on the module I linked above. Door Buzzer too quiet? - Ford Bronco Forum

    Based on a quick read of the above, it looks like it might have some potential.

    Provided that it is actually a chime and not a buzzer. Funny how many hits I got when I googled "chime" that actually related to "buzzer".
     
  17. crewchief

    crewchief A & P Mechanic

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    Thanks for all the information, looks like a good place to start. I did fine this one which is for a Viper. The pins look similar to the one used back then, but haven't found the schematic yet to verify.

    chime.jpg
     
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    • DionR

      DionR Well-Known Member

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      More I look, the easier it seems.

      Below is a clip from a '95 Ram service manual. Here is a link to a thread about removing the buzzer/chime - Want to get rid of that annoying door/key/light buzzer? look here :) - Dodge Cummins Diesel Forum (hope the pictures show up). Pretty sure the Ram buzzer/chime has the blade connections, but wasn't able to get a complete picture of one.

      Note that in the above thread the 95, 97-98 Ram used a chime, but the 96 used a buzzer. FYI

      Doesn't look like it is much harder than figuring out where to mount it and moving the connections over from the original buzzer. I need to look at the A-Body wiring diagram before I am sure, so don't quote me. Oh, and a wire off the headlight switch would need to be added if someone (like me) wanted a headlight on warning.

      Capture.JPG
       
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      • 72Valiant4Door

        72Valiant4Door Trouble Maker

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        Keep me up to date. I am loving this.
         
      • crewchief

        crewchief A & P Mechanic

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        I'm going to purchase a 12vdc chime from Radio Shack PN273-071B and wire that into the relay wiring, circumventing the buzzer and leaving the horn hooked up. I just have to look at my schematic's to see where to bypass the buzzer. I'll let you know if it works and how it sounds (approximately 80db), hopefully not too annoying.
         
      • DionR

        DionR Well-Known Member

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        ???
         
      • crewchief

        crewchief A & P Mechanic

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        It's my understanding that the horn relay also contains the buzzer for the key in ignition.
         
      • DionR

        DionR Well-Known Member

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        Ah. The wiring diagram I have for my '74 Duster shows the horn being a completely different circuit. May not be the same for all A-Bodies though.
         
      • DionR

        DionR Well-Known Member

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        I don’t have it locked down, but it does look easy to add the Ram chime.

        Based on my ’74 Duster wire diagram, the buzzer receives power and is grounded via the seatbelt interlock and/or door switch when the key is in the ignition.

        This means that in order to wiring in a chime from a Ram and make it function, it appears that the following would need to happen:

        1. Current power (red wire) to the buzzer will need to be moved to the chime (spade #7).
        2. The ground (black wire) that runs through the key-in switch and door switch needs to be moved to the chime (spade #6).
        3. A ground wire from spade #3 needs to be added. ​

        The above would recreate the current functionality with a chime rather than a buzzer.

        If additional functionality was desired, the below could be added:

        1. Chime when headlights are on, and door is open:
        a. Add a second ground to spade #6 (key-in switch above) that grounds when the headlights are on and door is open.​

        2. Turn the chime off when the car is running and door is opened:
        a. Add a hot wire from the blue ignition wire to spade #1.​

        The above ignores the brown wire running to the seatbelt interlock since ’74 is the only year it would exist, but in my case, it might make a convenient place to add the headlight ground.

        Not really sure how the headlight ground would be wired in. It appears the Ram headlight switch includes a ground switch, but the wiring diagram I have for my Duster doesn’t show the headlight switch including anything like that. Maybe a NO relay off the gauge lights that closes when the door is opened, completing the ground for the chime?
         
      • crewchief

        crewchief A & P Mechanic

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        Ok, on my 73 Horn/Buzzer relay the H2 dark green goes to the horn, B Hl goes to the fuse, M16 Blk goes to key switch, and H3 Blk goes to horn switch. Three are for the horn and one for the key buzzer. Seat belt circuit buzzer is on a different circuit.
         
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