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Thread: FM Modulator Help

  1. #1
    Constant Bitrate captain_jim1's Avatar
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    FM Modulator Help

    I went out and picked up a FM Modulator .. a Delphi SKYFi fm Modulator... connections include the following..

    Antenna In
    Antenna Out
    HeadPhone Line (Audio Input)
    12v Power Line
    Ground
    6v Power out (for powering external device)

    Now, this unit is made for hooking up to a XM Radio thingy .. but the man in Best Buy assured me it would work for normal things like CD Players, tape players, laptops , etc...

    However, I have it all wired up, tuned to the right station, and nothing happens. Only thing not wired is the 6v Power out .. because I am not powering anything ...

    I've tried different stations and still get the same effect. I can tune to real radio stations so I know the antenna connections are being made and I'm using the same power source and ground as the headunit (which works). What is going on?

    -Capt.

  2. #2
    Variable Bitrate
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    when you have it hooked up and powered on, do you lose some clarity on stations that arent that close to you? Mine takes some very noticable clarity away. If its not doing that then eithre you dont have it hooked up properly, or you arent actually powering it. How are you powering it anyway?
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  3. #3
    I'm sorry, and you are....? frodobaggins's Avatar
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    You either hooked it up wrong, or it's broken, it's that simple.
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  4. #4
    Constant Bitrate captain_jim1's Avatar
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    Yeah I didn't think it was that complicated. I'm powering it by tapping into the main power to the headunit. splice open the line .. solder in .. done deal .. should be working..

    Maybe I'll take it back and say it doesn't work .. see what those bozos do when I bring back a chopped up fm modulator...

    -Capt.
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  5. #5
    Maximum Bitrate kiltjim's Avatar
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    I'm trying the same thing. Now, I've actually taken the first one back, and tried a second one. No dice.

    I don't have the 6v plugged in, and I saw something about how the FM modulator is supposed to turn on automatically.

    Anybody out there get this thing to work?

    Any other ideas?
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  6. #6
    Maximum Bitrate
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    This may sound like a stupid question...but are you sure you tap into the right power line for your Head Unit???

    At one point...I wanted to do that too..but I couldn't figure out which one is power so instead I wire it to my fuse box.

    If you're sure it's powered...try selecting a station that you know has statics as the modulator station...if the modulator is powered up...you should not hear anything...no static at all...

    Hehe...another stupid question...are you sure you had the volume on the input up? What is the sound input you're putting on the modulator? Is it muted?

  7. #7
    Maximum Bitrate kiltjim's Avatar
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    Power for mine is wired to the RED wire on the radio, I even checked it with a meter, and yes, I'm getting power. The ground is going to the BLACK wire of the radio, and yes, it is the ground.

    The input is all the way up, and I verified this with a set of headphones.

    Has anyone used this same unit, and gotten it working?
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  8. #8
    Top Ramen lgbr's Avatar
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    Red is only hot when the key is on ACC or RUN. Try using the yellow wire, it's always hot.
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  9. #9
    Maximum Bitrate falconey's Avatar
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    If you're talking about the modulaters that come in the white box I'd say take it back. I called over the phone and asked if they had modulaters and when I got there they just had the things for xm radio. From your description of all the connectors it sounds like a normal modulater(minus the output power line), but there was some reason I didn't buy it when I read the box. I can't remember what it was because it's been about 6 months, but my advice would be to take it back, go to a local radio install shop and purchase one from them. I believe whatever it was that I read made it seem as if these units would only work with xm, but again I'm not totally sure. As you've decribed you're connections things should be working. The only thing I can think is the output power connector is for something that would get the modulater working i.e. the xm receiver.

  10. #10
    Constant Bitrate
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    I use a Delphi FM Modulator for my XM. Its possible that it only powers on when it recieves a draw on the 6volt line i guess. I just went and bought a second FM modulator from CircuitCity, hooked them inline and it works great.

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