ABS light not working

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  • Antsa
    S2Forum Maniac
    • Nov 2016
    • 611
    • Country: Finland

    #1

    ABS light not working

    My car is a -93 Avant ABY. Problem is as follows: when I turn the ignition on, the ABS light doesn't come on for a few seconds how it should. ABS itself works ok. Previous owner thought it was a instrument cluster fault, but i've tried a different cluster and the problem persists.

    I've checked that the abs bulb and the bulb circuit in the cluster is ok with a multimeter in continuity check and checking the cluster blue connector pins T26a/10 and T26a/16. Then I checked if the pin T26a/16 gets 12V when ignition is on. That's ok too. Then I thought I'd try continuity between T26a/10 and ground, but according to the wiring diagram the grounding runs through J106 (ABS solenoid valve relay) and J104 (ABS Control Unit) and I was afraid to blow the control unit so I didn't do it. Obviously the fault it somewhere in the ABS bulb grounding circuit? Anyone got any ideas how to proceed?

    I have used this wiring diagram. I've also read this thread. Could not find any relays with fuses in them. Could not even find any ABS relays. Not in the auxilary relay panel and not under the rear seat. Fuse box in the engine compartment did not even have the fuse diagram in it. So if there is an ABS relay/fuse, I have no idea what it is

    Edit: Even the ABY fuse box diagram would be much appreciated
    Last edited by Antsa; 4 January 2017, 07:00.
  • Antsa
    S2Forum Maniac
    • Nov 2016
    • 611
    • Country: Finland

    #2
    Fault found!! Took the big abs control unit connector out and checked the wire from ABS bulb to that connector and guess what? That yellow cable w/red stripe was broken. Had to strip almost the entire car apart to find the spot where the wire was cut. What a PITA job to do. Finally found the right spot under the dash, fixed the broken cable and the ABS light now works as it should

    Comment

    • newsh
      S2Forum Obsessed
      • Aug 2003
      • 16226
      • Country: United Kingdom

      #3
      Good work!

      S2 Coupe 3B Project


      Ur quattro restoration

      S2 Avant

      Boost is the new rock and roll!
      sigpic

      Comment

      • Antsa
        S2Forum Maniac
        • Nov 2016
        • 611
        • Country: Finland

        #4
        Thanks man!

        And I still could use the ABY main fuse box diagram if someone has it

        Comment

        • Error404
          Super Moderator
          • Mar 2007
          • 19789
          • Country: United Kingdom

          #5
          Is this what you need?

          Panthero Coupé quattro 20vt
          Indigo ABY coupé
          Imola B6 S4 Avant

          Comment

          • Antsa
            S2Forum Maniac
            • Nov 2016
            • 611
            • Country: Finland

            #6
            That might come in handy some day! But actually I was looking for the sticker that should be printed inside the main fusebox cover. The one that reads which fuse and relay does what. I'm not shure if diagram is the righr word for it though

            Comment

            • newsh
              S2Forum Obsessed
              • Aug 2003
              • 16226
              • Country: United Kingdom

              #7
              ABS light not working



              It's on the outside of the cover

              S2 Coupe 3B Project


              Ur quattro restoration

              S2 Avant

              Boost is the new rock and roll!
              sigpic

              Comment

              • Mikes2
                S2Forum Extremist
                • Jul 2003
                • 1704
                • Country: Scotland

                #8
                And if you hover over the word Fuses, you'll find a hot link that lists each fuse in a table
                Mike

                http://www.s2-audi.co.uk

                Comment

                • Antsa
                  S2Forum Maniac
                  • Nov 2016
                  • 611
                  • Country: Finland

                  #9
                  That is the pic I was looking for!

                  Thanks

                  Comment

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