ABS light comes on after hitting a large bump

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  • Mike36
    E30 Enthusiast
    • Mar 2011
    • 1077

    #1

    ABS light comes on after hitting a large bump

    1991 325i

    So the ABS light comes on after hitting a large bump. Turns off of restarting the car and stays off until I hit another large bump. Any ideas? Thanks in advance.
    sigpic
  • jbontke
    E30 Addict
    • Mar 2019
    • 445

    #2
    Check the ABS sensor plugs, most of the time the plastic connector is crumbling. The wires could be making contact with each other or the chassis ground.

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    • Mike36
      E30 Enthusiast
      • Mar 2011
      • 1077

      #3
      Originally posted by jbontke
      Check the ABS sensor plugs, most of the time the plastic connector is crumbling. The wires could be making contact with each other or the chassis ground.
      Do you mean by the one in the engine bay or under the dash. I guess Ill check both.
      sigpic

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      • e30davie
        E30 Mastermind
        • Apr 2016
        • 1788

        #4
        I assume he means the sensor plugs on the wheels them selves. There are wheel speed sensors on each wheel.

        Comment

        • Mike36
          E30 Enthusiast
          • Mar 2011
          • 1077

          #5
          Originally posted by e30davie
          I assume he means the sensor plugs on the wheels them selves. There are wheel speed sensors on each wheel.
          Oh yeah, I just re-read his reply. I'll check each one this weekend.
          sigpic

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          • cheffy30
            E30 Enthusiast
            • Sep 2016
            • 1159

            #6
            stop hitting large bumps.... ?

            sent from hell using Tapatalk
            ~~~~~~~~~~~~~~~~~
            '90 325i sedan daily driven
            '85 325e coupe also a daily

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            • Mike36
              E30 Enthusiast
              • Mar 2011
              • 1077

              #7
              Originally posted by cheffy30
              stop hitting large bumps.... ?

              sent from hell using Tapatalk
              I try, trust me :/
              sigpic

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