Installing new Alpine 138BT Head Unit
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Cadillac Seville / Cadillac Eldorado Forum Discussion, Installing new Alpine 138BT Head Unit in Past Cadillac Vehicle Discussion; General question about head units. I actually have two harnesses that seem to work. One uses RCA connectors to the ...
  1. #1
    tziady is offline Cadillac Owners Member
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    Installing new Alpine 138BT Head Unit

    General question about head units. I actually have two harnesses that seem to work. One uses RCA connectors to the Alpine 138BT that I am installing and one uses regular wires. I know that the RCA on the Alpine is a 4v Pre-out. Is it better to use the harness with the RCA as compared to the one that uses the speaker connections (white, white/black, green, green/black, purple, purple/black, ect)?

    Thanks allot in advance for the information,

    PS: one advantage I see about using the speaker wires is the ability to use noise reducers (esp. base reducers) on those lines. Would this be an issue for using one over the other?

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  3. #2
    tziady is offline Cadillac Owners Member
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    Installing new Alpine 138BT Head Unit

    I am installing a new Alpine 138BT. General question about head units. I actually have two harnesses that seem to work. One uses RCA connectors to the Alpine 138BT that I am installing and one uses regular wires. I know that the RCA on the Alpine is a 4v Pre-out. Is it better to use the harness with the RCA as compared to the one that uses the speaker connections (white, white/black, green, green/black, purple, purple/black, ect)?

    Thanks allot in advance for the information,

    PS: one advantage I see about using the speaker wires is the ability to use noise reducers (esp. base reducers) on those lines. Would this be an issue for using one over the other?

    PSS: can anyone suggest a good path to run the wires to the front dash? Back seat then run along the sides or the middle?

    Thanks allot...

    T

  4. #3
    MoistCabbage's Avatar
    MoistCabbage is online now Cadillac Owners 10000+ Posts
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    Do you have the Bose system? If so, you'll need an integration module, which I believe has RCA connectors.

    Wiring can be run down the sides, no need to run it down the center.

  5. #4
    MoistCabbage's Avatar
    MoistCabbage is online now Cadillac Owners 10000+ Posts
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    tziady, this is the third thread you've posted the same question in. Please don't double/triple post. Keep it in the thread you started.

  6. #5
    MoistCabbage's Avatar
    MoistCabbage is online now Cadillac Owners 10000+ Posts
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    Yes, starting the new thread was the right thing to do, but you posted in two other places too . When you post in more than one place, questions/answers get missed, and it takes longer for you to get an answer.

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    tziady is offline Cadillac Owners Member
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    Re: 1995 STS Speedometer / odometer issue

    oh....I am sorry about that. I did not realize that I did multiple post. Tired posting error. Sorry...

    T

  8. #7
    bwv565 is offline Cadillac Owners Enthusiast
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    Re: Installing new Alpine 138BT Head Unit

    If you buy from Crutchfield, they send you the wiring harness and complete installation instructions as well as tell you if it's even compatible with your vehicle for free. THey will also walk you through the installation over the phone if you need help. Just a thought.

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