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Thread: alarm antenna

  1. #1
    Variable Bitrate Sh0cker's Avatar
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    alarm antenna

    Hey, i have got under the dashboard to check whats wrong with my car alarm. After looking closer i saw alarm module with the cable cut in half. I opened the box, on the circuit board right where the cable was connected was written "antenna".
    How does alarm antenna look like, or its really just a piece of cable?
    btw: the reason i checked my alarm was because the remote had extremaly shor range, and i was trying to figure out whats wrong.
    Danny.

    "If today was perfect, there would be no need for tomorrow."
    My Car Project® ‹== !10.4" Allbrite, touchscreen, epia, 150opus, gps, wireless, sony remote [old] 128x64 Crystalfontz +double din [new]

  2. #2
    Constant Bitrate Suprapc's Avatar
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    the antenna usually is just a wire.
    2002 Golf TDI With Phatbox . Blue 87 Supra Needs to go, Grey 89 Targa with stock Radio.

  3. #3
    Maximum Bitrate SjLucky's Avatar
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    jack it into your fm antenna and see what happens

    Im just wondering if it will really do anything at all really I doubt it will do a lick of good
    Quote Originally Posted by menudude View Post
    thank you all for your help minus the useless post by sjlucky...

  4. #4
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    Wink

    Moust car alarm antenna are just that a wire thats cut to a tuned lenght. So I would say a some time its been cut of ,may have been the something moving under the dashboard. Just see if you can find the other pice of cable and see what the total lenght is (40cm-50cm ?) and replace it or just join it.
    or as said b4 you could jack it into your fm antenna It will work but you may still have shorter range that what you would with the leght of cable.

    pss A shourt rang for your car alarm is a good thing in my books, it means you don,t set it of my sitting on the remote and pople cant get the codes form your remote. but if you do what it to work from a long range run the antenna up the in silde of the window

    Have fun hope this helps

  5. #5
    Variable Bitrate Sh0cker's Avatar
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    I tried extending the antena with alike cable - didnt help.
    I still have to come close to the car (1feet away) and swing my remote at every direction to force the alarm to work. I'm guessing its the alarm itself that lacks the range of the remote.
    I'll try the radio antenna trick, hopefully that will help.
    Danny.

    "If today was perfect, there would be no need for tomorrow."
    My Car Project® ‹== !10.4" Allbrite, touchscreen, epia, 150opus, gps, wireless, sony remote [old] 128x64 Crystalfontz +double din [new]

  6. #6
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    Not meaning to funny but have you check the batter in the remote? or if the remote has been wet....

  7. #7
    Variable Bitrate Sh0cker's Avatar
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    week ago i bought brand new 12v battery, since the battery didnt change range of the remote, it is not an issue anymore.
    Danny.

    "If today was perfect, there would be no need for tomorrow."
    My Car Project® ‹== !10.4" Allbrite, touchscreen, epia, 150opus, gps, wireless, sony remote [old] 128x64 Crystalfontz +double din [new]

  8. #8
    Registered User belezeebub's Avatar
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    Measure the antenna and look on the back of the remote or in the book for the alarm if it gives you the Frqeuncy of the transmitter you can use this forulma to built a better antenna.

    a. Use the formula: Total length (FT) = 468
    divided by Frequency in MHz


    EXAMPLE: TOTAL LENGTH (FT) = 468 260.
    divided by 1.80 MHz 1.80/ 468.00


    This Site has a Java Script calculator for it

    http://www.angelfire.com/or/philccom/

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