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No power to coil

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  • No power to coil

    im getting no power to the coil, main relay is fine, ignition key tumbler is fine, fuse is fine.. any suggestions ?

  • #2
    Got the correct wiring diagram for your car? I would be probing the ignition switch to confirm power is going out when ignition is on.


    • #3
      Check for fuel. If there is none AND there's no spark then it's most likely the crank position sensor, or, the ECU.
      Ron ///Man

      • '91 Gr-A Former CiBiEmme / Ravaglia - Sold
      • '90 M3 Faux EVOII Alpineweiss 36K Orig Owner - The Queen
      • '91 M3 Faux EVO III Brilliantrot Euro Driveline - The Rocket
      • '91 M3 Faux Gr-A Club Racer DM - The Alter EGO
      • '89 M3 M3T / ITR Club Racer
      • '94 Spec E36 - Eh....
      • '09 M3 - Tarmac Terrorist
      • '04 330Xi Sport 6 Speed - Snowmobile
      • '07 530 Xi - Highway Star


      • #4
        I had no spark on an e28 525e recently (same 2 x sensors in bell housing) and I was getting power to the coil at 12+, but the coil was not being grounded by the ECU (signal). It was a faulty crank sensor. If he is not getting power to 12+ on the coil then its a wiring or ign switch issue....


        • #5
          I found the problem, it was the on -board computer relay box, itís behind the ABS control box under the dash.. I jumped the green & green & red wire and it started right up.. Thanks for the replyís and Iím really grateful it didnít burn..