Ignition switch 740

Discussion in 'Volvo 740' started by Andy Mann, Feb 20, 2005.

  1. Andy Mann

    Andy Mann Guest

    My ignition switch is sticking, when I start the car I have to wiggle the
    key in the ignition to get all the functions to work such ass radio windows
    windscreen wipe etc.

    I also not that from time to time the seatbelt warning also does not work.

    I have a problem with the cooling system which looks like it is only there
    when the seatbelt warning is not working.

    What circuits could be affecting the cooling system from the ignition switch
    or the drivers seatbelt warning.
     
    Andy Mann, Feb 20, 2005
    #1
  2. I'm thinking the problem isn't with the cooling system but perhaps the
    temperature guage itself not working right - unless you are getting actual
    overheating signs.

    The only electrical tie I can think of is that there is an electrical
    auxiliary fan in front of the radiator. It usually isn't needed except in
    hot weather, while idling at a stop.

    I recommend you replace the ignition switch soon. They tend to deteriorate
    from week to week, and sometime you may be stranded. It is a common failure.
    The switch electrical part is easily replaced and is under $100 US from
    aftermarket places like IPD
    http://www.ipdusa.com/productscat.aspx?CategoryID=63&NodeID=646&RootID=629

    Mike
     
    Michael Pardee, Feb 20, 2005
    #2
  3. As a codicil to that Mike, one of my VOC members recently took his car to an
    auto electrician as he had a very similar fault with his ignition switch (as
    indeed I have). He was told that the printed circuit behind the instrument
    panel needed some dry solder joints attended to. So far it seems to have
    done the trick. I am a bit sceptical but time will tell.

    All the best, Peter.
     
    Peter K L Milnes, Feb 20, 2005
    #3
  4. It could be. The instrument cluster comes out easily enough to make it an
    inexpensive thing to do, and the circuit board is large enough and with
    heavy things like connectors that there could be cracked solder connections.
    Good on them if they hit on the answer.

    Mike
     
    Michael Pardee, Feb 21, 2005
    #4
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