Wiring diagram for 89 740GL

Discussion in 'Volvo 740' started by iamsinan, Jan 14, 2006.

  1. iamsinan

    iamsinan Guest

    Hello guys,
    I have a 89 740GL.

    My problem: It doesn't start unless we give jump even with a brand new
    battery with full charge. It doesn't even crank, selenoid doesn't click
    (engage). Sometimes, the car cranks but doesn't fire up. If any of you
    have an experience with this problem, please let me know.

    I also need wiring diagram to pinpoint the faulty component. Does any
    of you have the wiring diagram?

    PS: What is Volvo DFL , if anyone knows? (it is a computer program, i
    know that much)

    TIA
     
    iamsinan, Jan 14, 2006
    #1
  2. Which fuel/ignition combo does your car have? there are a couple of types
    including carburettor.

    All the best, Peter.

    700/900/90 Register Keeper,
    Volvo Owners Club (UK).
     
    Peter K L Milnes, Jan 15, 2006
    #2
  3. Dunno about DFL.

    For the rest, look to see if your wiring has a separate terminal that goes
    under the nut on the positive battery post. Our '85 765T has one, and if
    that terminal doesn't make contact not much of anything turns on. The
    terminal loves to corrode and make poor contact, so its surfaces and the
    mating surfaces on the clamp have to be scraped or scoured periodically. I
    have even had trouble with the engine dying in left turns because of that.

    While you are there, check the 10 AWG red, orange or brown (I could never
    decide) wire at the positive clamp that provides power to the ECU. Sometimes
    that corrodes in two and the fuel pump becomes intermittent or quits... it
    can be hard to track down. Just tug gently and make sure the wire doesn't
    fall apart.

    Mike
     
    Michael Pardee, Jan 15, 2006
    #3
  4. iamsinan

    uccoskun Guest

    the car is a fuel injected one. I donot know more of that. I will check
    the corroded battery cables.
    PS: I'm a friend of the original message poster.
     
    uccoskun, Jan 15, 2006
    #4
  5. iamsinan

    James Sweet Guest


    If you're in North America then you have LH Jettronic injection and
    Bosch EZK ignition.
     
    James Sweet, Jan 15, 2006
    #5
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