anyone out there with an old school phone hookup?
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Cadillac Audio, Video and Security Systems Discussion, anyone out there with an old school phone hookup? in Item Specific Cadillac Discussion; So my 99 Deville D'elegance has a little box with what appears to be a phone jack and an Ethernet ...
  1. #1
    mcss88 is offline Cadillac Owners Member
    Automobile(s): 1999 & 1997 Deville D'elegance
    Join Date
    Jun 2011
    Location
    Austin, Minnesota
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    anyone out there with an old school phone hookup?

    So my 99 Deville D'elegance has a little box with what appears to be a phone jack and an Ethernet port attached to the front arm rest near the rear. I also have what appears to be a microphone attached to the "overhead console", a strange connection point near my OBD II port, the steering wheel controls, and my instrument cluster says no phone data when I hit the information button enough times.

    Is this typical for a Cadillac of this vintage or is it something aftermarket? I ran my RPO codes from my spare tire and it mentioned nothing about phone.

    I'll post pics when daylight time permits.

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  3. #2
    N*Caddy's Avatar
    N*Caddy is offline Cadillac Owners Master
    Automobile(s): 1997 Cadillac STS (BOSE w/AUX In, Massage Seats, URPAS, "Z")
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    Re: anyone out there with an old school phone hookup?

    Appears that your Cadillac had the fairly rare cell phone option and you are missing the headset.
    No aftermarket integration will be able to tap into the IPC to get the "No cell phone data" message.
    Your left top steering wheel control button should show a phone symbol on it rather than the fan symbol.
    You can disable the cell phone option and switch the function of this steering wheel button from cell phone to fan speed control. You can replace the steering wheel controls with the (far more common) ones having the fan symbol (electrically there is no difference other than the symbol).
    This is done in the IPC overrides by deducting 16 from the IPS03 Option C. Probably your value was set from factory to 241, deducting 16 will give you 225 (your original value may vary depending on the options).
    You can check your RPO sticker or just list here your VIN and we can tell you for sure.

  4. #3
    mcss88 is offline Cadillac Owners Member
    Automobile(s): 1999 & 1997 Deville D'elegance
    Join Date
    Jun 2011
    Location
    Austin, Minnesota
    Age
    25
    Posts
    7

    Re: anyone out there with an old school phone hookup?

    I'll toss the vin up tomorrow however, I have decoded the VIN and the RPO codes and saw nothing mentioning the phone option. How do I access the IPC overrides; this is something I've never heard of.

  5. #4
    twrtoad is offline Cadillac Owners Member
    Automobile(s): 1997 eldorado
    Join Date
    Jun 2013
    Location
    Pendleton oregon
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    34

    Re: anyone out there with an old school phone hookup?

    Hello,
    My 97 eldorado came with the phone option inside the arm rest. It looks kinda clunky and obsolete. I never tried it to see if it works. I wonder if you have to subscribe to a service to make it even work, either way i got it all saved in case I sell the car down the road and the new owner wants to try it.
    Jim

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