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Thread: Crazy Instrument Cluster Problems - Help Please!

  1. #1
    Join Date
    Feb 2016
    Location
    Albany, OR
    Posts
    10
    My Cars
    1984 BMW 633csi

    Crazy Instrument Cluster Problems - Help Please!

    I've looked all over the forums and I can't find the answer to my problem in particular! Car is an 84 633csi.

    Please help!

    -Speedo jumps upon ignition but doesn't work.
    -MPG Gauge swings wildly from one either one end to the other upon applying throttle/letting off.
    -Temp gauge works most of the time but will sometimes just fall loose until I turn off and turn on the car.
    -Odo is completely dead.
    -Tach works perfectly though!
    -Cluster lights work intermittently.

    I've already REPLACED the speed sensor on the diff!

    Help please!

    Edit: All the gears (including the small one) have been replaced.

    Sent from my SM-G900P using Tapatalk
    Last edited by SethBerg; 08-09-2017 at 02:44 PM.

  2. #2
    Join Date
    Jun 2010
    Location
    Oakland, CA, USA
    Posts
    12
    My Cars
    '87 635CSi Black/Pearl
    Sounds to me like you need a new SI board. The motherboard eventually goes kaput. I know: I need a new one too on my '87. Programma is the only company that still makes the boards (refurbished) You'll need a new odo gear kit too. It's all fairly inexpensive but a ton of work. I defer to others on speedo. Check online for programma boards & odo kits. Odo is a very patient, bench job. Good luck....


    Sent from my iPhone using Tapatalk
    '87 635Csi Black/Pearl
    "Sabine"

  3. #3
    Join Date
    Feb 2016
    Location
    Albany, OR
    Posts
    10
    My Cars
    1984 BMW 633csi
    Quote Originally Posted by Jens6er View Post
    Sounds to me like you need a new SI board. The motherboard eventually goes kaput. I know: I need a new one too on my '87. Programma is the only company that still makes the boards (refurbished) You'll need a new odo gear kit too. It's all fairly inexpensive but a ton of work. I defer to others on speedo. Check online for programma boards & odo kits. Odo is a very patient, bench job. Good luck....


    Sent from my iPhone using Tapatalk
    Thanks for your help! I hope that works. With these cars you never know.

    Sent from my SM-G900P using Tapatalk

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