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Small antenna connector for stock radio? V70-XC70 1999

posted by  drj434343 on  Tue Oct 13 09:39 CST 2009
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last visit: Thu Oct 24 09:46 CST 2013
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I've finally had to replace the SC-816 (internally amplified) factory radio in my V70 because the FM died. I've got a replacement unit in there now, but when I pulled the original, I noticed there were two antenna connectors. One was the standard connector, round, male, about 0.35" diameter. That one fit perfectly in the standard receptacle on the new radio. A second connector right next to it is the mystery. Structurally it is identical, but appears smaller, say 0.25" diameter. I've never seen one of these before.

My FM reception on the new radio is less than stellar. Does any one know what that smaller connector is for?








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    Small antenna connector for stock radio? V70-XC70 1999

    posted by  KlausC on  Tue Oct 13 11:20 CST 2009
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    last visit: Fri Oct 24 10:15 CST 2014
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    The second cable connector is probably for a CD player.

    As for poor reception, check the rear side window electrical elements. That is your antenna. If the copper(?) wiring is cracked, there is a repair kit sold at parts stores to fix heater element wire. The same stuff will work for the antenna.
    There is also a signal booster under the side window that might be problematic.

    Klaus
    --
    Proud owner of a 1967 220S. If I had more room, I would have more Volvos.








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      Small antenna connector for stock radio? V70-XC70 1999

      posted by  drj434343 on  Tue Oct 13 11:48 CST 2009
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      Actually, I think I've finally got you Klaus. I did some digging elsewhere (Brickboard's search is dismal), and it isn't a CD changer connection (that's an 8 pin).

      It appears that second connector is a diversity antenna, standard on T5 models (mine), and an option on others. It was a secondary pickup using the rear defrost circuit.

      http://volvospeed.com/vs_forum/index.php/topic/113538-s70-sub-antenna-location-part-number-anything/page__fromsearch__1

      Very interesting. I need to find an adaptor of some kind.

      Anyone with a T5 conquer this before? If not, it's ripe for a writeup.








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        Small antenna connector for stock radio? V70-XC70 1999

        posted by  KlausC on  Tue Oct 13 17:02 CST 2009
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        Got me? That's easy to do. But, you have a V70, not an S70. All of the V70's have the antenna in the rear quarter glass. If your windows have been replaced with plain glass then you have a problem.
        The amplifier for the antenna may be unplugged or not working.

        Klaus
        --
        Proud owner of a 1967 220S. If I had more room, I would have more Volvos.








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        Small antenna connector for stock radio? V70-XC70 1999

        posted by  bryan goldberg on  Tue Oct 13 15:48 CST 2009
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        last visit: Wed Jun 26 12:41 CST 2013
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        drj#'s,

        I think that the "dual diversity antenna" is standard on all S70's and probably the 850's.

        At least it's present on my S70 GLT and isn't listed as an option on the data sheet.

        The booster box is located on the LH "C" pillar and does appear to use the defogger grid for its trace. In fact the fasteners for the trim panel are molded into it.

        Since most other manufacturers had years before gone to using a separate antenna trace on the rear glass as the only antenna, I'm guessing this is another example of Volvo's weird engineering.

        Have fun,
        Bryan








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          Small antenna connector for stock radio? V70-XC70 1999

          posted by  drj434343 on  Wed Nov 4 16:04 CST 2009
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          last visit: Thu Oct 24 09:46 CST 2013
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          Thought I'd post a follow up. I found a conversion for that small connector, made for late model GM cars. With slight modification it fit my small connector perfectly and ended in the standard motorola connector. From there I got a Y adaptor so both antennas could go into the single input on the stereo. I immediately regained my lost 20% reception.

          I found the GM antenna adaptor at Fry's of all places. First time ever I've met and gotten help from a competent employee.







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