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RS232 to 9 pin serial port cable

Discussion in 'Electronic Repair' started by gfulton, Sep 22, 2003.

  1. gfulton

    gfulton Guest

    I need a cable or wiring insructions, if possible, to adapt a 9 pin serial
    computer port to an RS232 type male connector. The cable is needed for an
    automotive diagnostic tool I have and is used for loading software updates
    from my computer to the tool. The mfr. wants $55.30 for this thing and I
    believe I can build it or find it cheaper somewhere else. Struck out at the
    local radio shack. Thanks for any help.

    Garrett Fulton
     
  2. Quadrajet1

    Quadrajet1 Guest

    << I need a cable or wiring insructions, if possible, to adapt a 9 pin serial
    computer port to an RS232 type male connector. The cable is needed for an
    automotive diagnostic tool I have and is used for loading software updates
    from my computer to the tool. The mfr. wants $55.30 for this thing and I
    believe I can build it or find it cheaper somewhere else. Struck out at the
    local radio shack. Thanks for any help.

    Garrett Fulton >>

    There is no such thing as an RS232 connector, I assume you mean DB25
    connector? Where does this diagnostic thingamajig plug into? Serial or
    parallel port? The diagnostic tool has a 25 pin male connector, it's made for
    a parallel port it sounds like.

    Raymond
     
  3. gfulton

    gfulton Guest

    It goes from the 9 pin serial port on my computer to a female socket on the
    top of the tool that looks like a big telephone connector. I probably
    didn't have the terminology right. All I've been able to find doing an
    internet search is 9 pin serial port to USB adapter cables and those won't
    work on this thing. I let a friend borrow the tool to read the codes on
    his car and don't have it with me today. I believe the telephone looking
    socket has 9 pins also.

    Garrett Fulton
     
  4. Franc Zabkar

    Franc Zabkar Guest

  5. Quadrajet1

    Quadrajet1 Guest

    << It goes from the 9 pin serial port on my computer to a female socket on the
    top of the tool that looks like a big telephone connector. I probably
    didn't have the terminology right. All I've been able to find doing an
    internet search is 9 pin serial port to USB adapter cables and those won't
    work on this thing. I let a friend borrow the tool to read the codes on
    his car and don't have it with me today. I believe the telephone looking
    socket has 9 pins also.

    Garrett Fulton >>


    Ahhhh okay, it does sound like a custom cable then. The phone jack somes in
    even number of pins from 2 to 10. Phones use 4 or 6 pin, 10baseT Ethernet uses
    8 pin jacks. They do make a 10, but it's not used much.

    Does you friend have the cable, or do you even need the cable except to
    download to your PC? Somewhere, there may be a wiring diagram for that cable
    (not likely), best bet is to find someone with the same machine, and copy their
    cable, or bite the bullet if all else fails. And write down the specs in case
    the cable is ever lost.

    Raymond
     
  6. gfulton

    gfulton Guest

    Thanks, Raymond. I did some more calling around again today and you're
    right in that it's definitely a custom cable. I'll just order it and pay
    the money, I reckon.

    Garrett
     
  7. Ross Mac

    Ross Mac Guest

    Just look it up on Google...It sounds like you need a serial adaptor that
    gets you from DB9 to RJ11...a fairly common adaptor in the 80's...try
    calling a couple of surplusers...
    Here is one... http://www.altronics.com
    Usually this is an adaptor and you just buy the length of cable you
    need...hope this helps....Ross
     
  8. gfulton

    gfulton Guest

    Thanks Ross. I went ahead and paid the $55 and ordered the cable the day
    before your post. I need it pretty quick anyhow as I need to use the
    scanner and can't until I've loaded the update.

    Garrett
     
  9. Quadrajet1

    Quadrajet1 Guest

    Thanks Ross. I went ahead and paid the $55 and ordered the cable the day
    before your post. I need it pretty quick anyhow as I need to use the
    scanner and can't until I've loaded the update.

    Garrett >>

    Those 9 pin to RJxx adapters typically come unwired. You have to configure
    them for your own use, which cannot be determined without a wiring diagram.

    Raymond
     
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