93 940 turbo

Discussion in 'Volvo 940' started by Ed, Jun 3, 2008.

  1. Ed

    Ed Guest

    I'm unable to use the cruise control. If I hold the button in it seems to
    want to accelerate but as soon as I release the button it goes back to idle.

    I'm not sure where the module that controls this function. If I had to guess
    I'd feel it was electrical, like maybe the switch on the brake pedal is
    staying on.

    So any help on how to start the diagnosis process./
    Thanks. Ed

    Note please look at my next post about AM radio noise.
    Ed, Jun 3, 2008
  2. Ed

    James Sweet Guest

    Check the brake pedal switch first, on my 740 I believe it's a vacuum
    switch, I haven't looked in a while though.
    James Sweet, Jun 3, 2008
  3. Ed

    . Guest

    Are your brake lights working?

    If not it could be the bulb out relay in the center console, the power for
    the brake lights is split 3 ways in the relay and I believe the cruise
    control senses a ground through it.

    My relay needed the solder toudhed up on the brake light pins (94 940) I had
    no brake lights and no cruise control.

    Hope this helps
    ., Jun 8, 2008
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