Help please (S40, a bit of panic)

Discussion in 'Volvo S40' started by Serial # 19781010, Sep 10, 2009.

  1. Hi all,

    I am in a bit of a bind and I hope this is a straight-forward/common
    enough problem that a solution is evident to the pros here.

    I have a 2001 S40 1.9T with about 240K on it. About a week ago the
    turn signals started intermittantly failing: the dash indicator and
    exterior lamps as well as the telltale "clicking" would either not
    start or stop after a few clicks. The hazard switch would also not
    work during these episodes.

    Suspecting either the hazard switch or the relay I removed and
    inspected both. The hazard switch seemed fine, a very simple
    mechanism, and I reinstalled it. The relay (a difficult thing to get
    at in this car) showed, once opened, that the solder around one of the
    poles was clearly cracked. So today I ordered a replacement and once I
    got it home and plugged it in was disapointed to find that this DID
    NOT fix the problem!

    All fuses have been inspected and are intact.

    If the switch on the steering column is at fault, would it also take
    out the hazard? I have to drive out of town on Sunday and Friday
    (tomorrow) is my last chance to get a part... I'm getting a bit
    desperate here... what should I check? I have a volt meter and Vadis
    but the latter is cryptic and cumbersome to work with.

    Your suggestions are greatly appreciated!

    Thanks in advance,
    Serial # 19781010, Sep 10, 2009
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  2. Serial # 19781010

    James Sweet Guest

    By hazard relay, do you mean the flasher, or is there a separate relay?
    James Sweet, Sep 11, 2009
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  3. Sorry, I mean the part I replaced was the flasher relay part
    #30870939. The Hazard Switch #30623426 was inspected but not replaced.

    I have pulled the turn signal switch off the steering column in
    anticipation of needing to replace it or perhaps checking it in some
    Serial # 19781010, Sep 11, 2009
  4. check for dirty connections loose or corroded as well as dirty fuses .This
    seems to be a common problem with volvos.
    Jon Robertson, Sep 11, 2009
  5. Serial # 19781010

    blurp Guest

    Yes it is, I did check the fuses and scuffed their tips a bit too. I
    received a wiring diagram over email and was able to test the hazard
    switch socket and it seems his may be he culprit after all.

    I'm picking up a new swich tomorrow. If that doesn't work I'll have to
    drive with my arm out the window.

    blurp, Sep 11, 2009
  6. Serial # 19781010

    James Sweet Guest

    There's only a handful of components in the circuit, it can't be that
    hard to work methodically, test each section, and eliminate everything
    one at a time until you find the problem.
    James Sweet, Sep 11, 2009
  7. Serial # 19781010

    blurp Guest

    Sure enough, it was the hazard swich. Visually inspecting it didn't
    reveal anything but the voltmeter showed it was getting all the right
    signals and the wiring diagram explained how the turn-signals were on
    the circuit.Swapped it out and problem was solved... thanks again!

    Next question is...

    blurp, Sep 16, 2009
  8. Serial # 19781010

    James Sweet Guest

    A volt meter won't tell you the whole story. If you have a high
    resistance connection, you might measure full voltage there, but put any
    load on it and the voltage drops down.
    James Sweet, Sep 17, 2009
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