Sluggish speedometer

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  • Colby.325e
    E30 Addict
    • Apr 2012
    • 414

    #1

    Sluggish speedometer

    So today while I was fucking with my radio, I crossed some wires and popped the 21 fuse. Tach, mpg gauge died along with radio, obc, interior lights, and other things. I noticed my speedometer worked, but not as it should. It takes a long time to reach the speed I'm traveling, and the needle won't even move until I hit 10+ mph. When it finally does get off it's ass and go, it moves incredibly slow. Is it a possibility that the surge could have messed up the speed sensor on the diff?

    Does anyone either a) know the specs to test it with a multimeter, or b) know where to find said specs? My Bentley is at home, and I was hoping to grab parts and have it fixed before I leave work.

    Any help is appreciated. Sorta lost on this one. Everything else is back to full working order.


    1986 325e - RIP
    1987 528e - Sold
    1989 325iX - Parted Out
    1991 318iS - Sold
    1991 325iS - Current
  • Gregs///M
    Forum Sponsor
    • Mar 2012
    • 2459

    #2
    I'd start by removing the connector on the diff, and cleaning both the connector and sensor terminals. Then re-secure. That might just get it back to normal.
    Owner - Bavarian Restoration
    BMW and European Electronics Repair and Restoration
    www.BavRest.com
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