Golf, Jetta, Corrado, Vanagon, new models, etc

'97 Jetta – rewire radio to bypass ignition switch

My ignition switch is flakey.  For a year I could run the radio in ANY position
(even without key), now I can run it only in one small sweet spot which is NOT
normal operating position…

so….

since no other function of the switch is affected & I am real low on funds…

the Bentley shows the radio wired to 1 signal on the ignition switch.  All I
need do is splice that lead from the radio to an appropriate power source.

Has anyone done this ???

…eric

Comments (5)




5 Responses to “'97 Jetta – rewire radio to bypass ignition switch”

  1. admin says:

    eric w wrote:

    > My ignition switch is flakey.  For a year I could run the radio in ANY position
    > (even without key), now I can run it only in one small sweet spot which is NOT
    > normal operating position…

    > so….

    > since no other function of the switch is affected & I am real low on funds…

    > the Bentley shows the radio wired to 1 signal on the ignition switch.  All I
    > need do is splice that lead from the radio to an appropriate power source.

    I did something like this on my 87 Jetta.  Only I used the "always on"
    power at the radio connector (that keeps it from forgetting the time and
    such).  I fused it and ran it to a rocker switch that I placed
    discretely under the dash so I could also switch it off for extended
    periods of time.

    However…..

    The dodgey ignition switch may also affect your ability to use things
    like headlights, warning chimes etc.  Replacement switches are only
    about CAD$30 at the dealer and it is not a big job to replace the
    switch. A google search of the topic should reveal a post (by me!) on
    the how to’s.  See also Pencilneck’s awesome site (for A2′s, though).

    Anthony Brown, Ph.D.              E-mail: abr…@unb.ca
    Research Associate                Phone:  (506)-458-7703
    Department of Electrical          Fax:    (506)-453-3589
      and Computer Engineering    
    University of New Brunswick
    PO Box 4400
    Fredericton, NB
    Canada
    E3B 5A3

  2. admin says:

    Well..you could do it.  But spend a few bucks on a switch to put in there.
    The radio operates at different "levels" depending on the power it’s
    receiving.   If you just wire it right to a source, chances are you’ll end
    up eventually draining your battery, whether the radio is on or not.
    Switches are cheap.  Make sure you get one with a proper amperage rating.
    Good luck..have fun.

    –Andy P

    "eric w" <e…@nospam.net> wrote in message

    news:vSrfmdoFuNkL-pn2-kXDMKixNXkcd@nospam.nospam.net…

    - Hide quoted text — Show quoted text -

    > My ignition switch is flakey.  For a year I could run the radio in ANY
    position
    > (even without key), now I can run it only in one small sweet spot which is
    NOT
    > normal operating position…

    > so….

    > since no other function of the switch is affected & I am real low on
    funds…

    > the Bentley shows the radio wired to 1 signal on the ignition switch.  All
    I
    > need do is splice that lead from the radio to an appropriate power source.

    > Has anyone done this ???

    > …eric

  3. admin says:

    - Hide quoted text — Show quoted text -

    On Fri, 4 Jul 2003 18:17:52 UTC, Anthony Brown <abr…@unb.ca> wrote:
    > eric w wrote:

    > > My ignition switch is flakey.  For a year I could run the radio in ANY position
    > > (even without key), now I can run it only in one small sweet spot which is NOT
    > > normal operating position…

    > > so….

    > > since no other function of the switch is affected & I am real low on funds…

    > > the Bentley shows the radio wired to 1 signal on the ignition switch.  All I
    > > need do is splice that lead from the radio to an appropriate power source.

    > I did something like this on my 87 Jetta.  Only I used the "always on"
    > power at the radio connector (that keeps it from forgetting the time and
    > such).  I fused it and ran it to a rocker switch that I placed
    > discretely under the dash so I could also switch it off for extended
    > periods of time.

    > However…..

    > The dodgey ignition switch may also affect your ability to use things
    > like headlights, warning chimes etc.  Replacement switches are only
    > about CAD$30 at the dealer and it is not a big job to replace the
    > switch. A google search of the topic should reveal a post (by me!) on
    > the how to’s.  See also Pencilneck’s awesome site (for A2′s, though).

    unfortunately on the A3s, switch replacement requires extracting the airbag &
    is a labor intensive operation.

    thanks for your help.

    …eric

  4. admin says:

    Eric – I would recommend getting a circuit tester (multimeter) borrowing one
    or buying a cheap one? (The UK have them availiable for less than £10
    ($16?) )
    There will be a perm live from somewhere near the radio – the cigar lighter
    for one might have a perm live. With the tester you’ll be able to find one
    easily and quickly. If your radio is fused independantly (all generally are)
    then you should be fine – otherwise a cheap in-line fuse for a couple of
    dollars would do well.

    Hope that helps a little

    Michael
    "eric w" <e…@nospam.net> wrote in message

    news:vSrfmdoFuNkL-pn2-cskvOtpRcfBL@nospam.nospam.net…

    - Hide quoted text — Show quoted text -

    > On Fri, 4 Jul 2003 18:17:52 UTC, Anthony Brown <abr…@unb.ca> wrote:

    > > eric w wrote:

    > > > My ignition switch is flakey.  For a year I could run the radio in ANY
    position
    > > > (even without key), now I can run it only in one small sweet spot
    which is NOT
    > > > normal operating position…

    > > > so….

    > > > since no other function of the switch is affected & I am real low on
    funds…

    > > > the Bentley shows the radio wired to 1 signal on the ignition switch.
    All I
    > > > need do is splice that lead from the radio to an appropriate power
    source.

    > > I did something like this on my 87 Jetta.  Only I used the "always on"
    > > power at the radio connector (that keeps it from forgetting the time and
    > > such).  I fused it and ran it to a rocker switch that I placed
    > > discretely under the dash so I could also switch it off for extended
    > > periods of time.

    > > However…..

    > > The dodgey ignition switch may also affect your ability to use things
    > > like headlights, warning chimes etc.  Replacement switches are only
    > > about CAD$30 at the dealer and it is not a big job to replace the
    > > switch. A google search of the topic should reveal a post (by me!) on
    > > the how to’s.  See also Pencilneck’s awesome site (for A2′s, though).

    > unfortunately on the A3s, switch replacement requires extracting the
    airbag &
    > is a labor intensive operation.

    > thanks for your help.

    > …eric

  5. admin says:

    On Tue, 8 Jul 2003 12:07:13 UTC, "Michael McL" <removemclanna…@yahoo.com>
    wrote:

    - Hide quoted text — Show quoted text -

    > Eric – I would recommend getting a circuit tester (multimeter) borrowing one
    > or buying a cheap one? (The UK have them availiable for less than £10
    > ($16?) )
    > There will be a perm live from somewhere near the radio – the cigar lighter
    > for one might have a perm live. With the tester you’ll be able to find one
    > easily and quickly. If your radio is fused independantly (all generally are)
    > then you should be fine – otherwise a cheap in-line fuse for a couple of
    > dollars would do well.

    > Hope that helps a little

    > Michael
    > "eric w" <e…@nospam.net> wrote in message
    > news:vSrfmdoFuNkL-pn2-cskvOtpRcfBL@nospam.nospam.net…
    > > On Fri, 4 Jul 2003 18:17:52 UTC, Anthony Brown <abr…@unb.ca> wrote:

    > > > eric w wrote:

    > > > > My ignition switch is flakey.  For a year I could run the radio in ANY
    > position
    > > > > (even without key), now I can run it only in one small sweet spot
    > which is NOT
    > > > > normal operating position…

    > > > > so….

    > > > > since no other function of the switch is affected & I am real low on
    > funds…

    > > > > the Bentley shows the radio wired to 1 signal on the ignition switch.
    > All I
    > > > > need do is splice that lead from the radio to an appropriate power
    > source.

    > > > I did something like this on my 87 Jetta.  Only I used the "always on"
    > > > power at the radio connector (that keeps it from forgetting the time and
    > > > such).  I fused it and ran it to a rocker switch that I placed
    > > > discretely under the dash so I could also switch it off for extended
    > > > periods of time.

    > > > However…..

    > > > The dodgey ignition switch may also affect your ability to use things
    > > > like headlights, warning chimes etc.  Replacement switches are only
    > > > about CAD$30 at the dealer and it is not a big job to replace the
    > > > switch. A google search of the topic should reveal a post (by me!) on
    > > > the how to’s.  See also Pencilneck’s awesome site (for A2′s, though).

    > > unfortunately on the A3s, switch replacement requires extracting the
    > airbag &
    > > is a labor intensive operation.

    > > thanks for your help.

    > > …eric

    Thanks to everyone for replying… the solution is pasted below for anyone in a
    similar situation.

    It turns out the signal from the ignition switch merely operates a relay in the
    radio. (consult Bentley for doc )….

    If anyone wants an always on radio (like older VWs) or loses the ignition
    switch function, my mod works!
    (I just hope the important functions of ignition switch continue to work :) )

    >If I cut pin 4 on connector III (radio connector) & splice it into pin 7
    >I should accomplish task,

    and it DOES!

    …eric

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