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FM transmitter question?

Discussion in 'Electronic Design' started by John P., Apr 27, 2006.

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  1. John P.

    John P. Guest

    I Just bought an fm transmitter and since i hate the stupid plug and
    all the wires i hard wired it to the car. first is this safe? also my
    power supply to the transmitter is always on even when the key is out.
    and the red LED on the transmitter is always on. My main question is,
    is it ok to leave it on all the time?, and will it drain my battery? i
    already did it to my sirius radio. My transmitter is a Monster brand
    one, i provided a link below for reference:

    http://www.radioshack.com/product/i...=fm+transmitter&kw=fm+transmitter&tab=summary

    Thanks!
     
  2. Ken Taylor

    Ken Taylor Guest

    Did you wire it to the cigarette lighter wiring or somewhere else? If
    you have it on the accessories/on wiring, so that it is off when the car
    is off, battery drain is not an issue.

    Ken
     
  3. I suspect that after a 2 week vacation with the car parked in the long
    term lot, you'll need jumper cables to get the car started and since
    car batteries don't handle deep discharge, you'll be getting one of
    those, too. Why don't you just connect it on the accessory side of the
    power? Do you need it to function without the key?

    As far as 'safe', do you have a fuse in the +12 line so if something
    shorts out, you don't start a fire or damage the wiring harness?

    GG
     
  4. Ken Taylor

    Ken Taylor Guest

    Dumb, dumb response. That sort of day....... rewire your tx so it runs
    off the cig. lighter, as I (sort of) implied.

    Cheers.
     
  5. John P.

    John P. Guest

    I just disconnected the ciggerect wire harness and connected it to my
    transmitter. both my cigar plugs are always on even when the key is
    out. So it wont drain or cause any harm if its on with out the engine
    on for say 14 hours somtimes? also how do you just connect it to the
    accesorie power, please guide me through. thanks!
     
  6. TwistyCreek

    TwistyCreek Guest

    John P. said
    Wire it to one of the interior lamps. Of course you'll have to drive
    around with the door open. This is fine for the summer though.
     
  7. Guest

    Look down on the fuse block. Lots of cars have a power terminal there.
    ("fused Ign" or something like that)
    It really depends on the year, make and model of the car to get
    detailed advice.
     
  8. John P.

    John P. Guest

    1999 chevy malibu ls
     
  9. John P.

    John P. Guest

    Sweet all done! drilled a hole in the center consul, and istalled a hot
    LED switch connected both the sirius and the transmitter to the switch
    then soldered them! looking very good!
     
  10. Pooh Bear

    Pooh Bear Guest

    You have got a fuse in the 12V feed haven't you ?

    Graham
     
  11. John P.

    John P. Guest

    well im using the cigar lighter power wires,and those are already on a
    fuse line, right?
     
  12. Pooh Bear

    Pooh Bear Guest

    I wouldn't know.

    But you *should* !

    Graham
     
  13. SioL

    SioL Guest

    Cigar lighter socket can provide some serious current so I suspect its fuse
    might out-live a short and rather burn another potentially weak spot in your
    wiring. It would be smart to use a small fuse.
    Thin Cu wire can literally burn when shorted over 12V which can burn you
    severely or do some damage to the car.
     
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