2000 Concorde LXi

Discussion in 'Concorde' started by jaygreg, May 10, 2011.

  1. jaygreg

    jaygreg Guest

    As I got out of my car (in the garage) a hour ago, I noticed a
    reflection of red brake lights on the wall. Walked to the back and ....
    sure enough... brake lights were on So was the light that comes on in
    the back window. Hit the brake pedal but lights remained on. Hit it
    again and this time they went off.

    What's THAT all about? Potential root causes please. No rug nor mat was
    anywhere near the brake pedal. Light switch was off.

    P.S. Car is well maintained and otherwise operating without exception.
    jaygreg, May 10, 2011
  2. jaygreg

    Greg Houston Guest

    Sounds like your brake switch is out of alignment. There is a fairly
    easy way to adjust it, I think it involves pulling it out all the way or
    in all the way, then letting go to self-adjust, but can't remember
    offhand. It is documented in the factory service manual and should take
    less than a minute to fix.

    Another concern is why it is out of alignment. It could be just random,
    or it could be a symptom of the brake booster going bad. Has that ever
    been changed? They accumulate water over time and eventually fail/need
    Greg Houston, May 10, 2011
  3. jaygreg

    jaygreg Guest

    No, Greg, the booster has never been changed by me and I've had the car
    from about 25K mile on to the 130K it has now. Those brakes have always
    been a point of frustration; warped rotors, two bad bearings. The car
    almost always felt (as it does right now) that it's got a bump on some
    part of the brake (rotor warped again probably). It's slight, but I'm
    sensitive to these little issues. Maybe that's why the car is still in
    such good shape, :)

    I'll have that booster looked at. I scanned the section of of the manual
    and saw the need for gages so....I 'll have to have it looked at by a
    mechanic with the proper tools.

    Thanks for your help.
    jaygreg, May 11, 2011
  4. jaygreg

    Greg Houston Guest

    To be sure, a brake light switch issue does not mean you have a booster
    problem. However for me it was an early indication that something was
    changing and I experienced a brake booster failure during the next cold
    snap, which was about a month later. (The accumulated water in the
    booster froze in 15F degree weather).

    I would just recalibrate the switch using the very quick FSM procedure
    but be sensitive to brake booster issues (loss of brake assist, hissing
    noises, etc.) It's likely nothing will be noticeable anyway until
    winter, depending on your climate. But an uncalibrated brake switch
    that leaves your brake lights on can leave you stranded due to an empty
    battery, plus a reduction in battery life.
    Greg Houston, May 12, 2011
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