Question about 1990 BMW 5 Series

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Need a key to which relays are which 1990 bmw525i only 2v at coil

I have tried all i know to do, my car wont fire, it is only getting 2 volts to the coil. i am trying to test the relays but i cant find a diagram for what relays go to what. any help please

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  • snelson_26 Jun 28, 2009

    if there are no relays how do i track the power supply to the coil

  • snelson_26 Jun 28, 2009

    i am not finding the module

  • yadayada
    yadayada May 11, 2010



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Their are no relays ,try fitting a new ignition module

Posted on Jun 28, 2009

  • Colin Stickland
    Colin Stickland Jun 28, 2009

    power comes from ignition key switch too the ignition module then the coil ,this is an old car remember

  • Colin Stickland
    Colin Stickland Jun 29, 2009

    got me trying to remember ?? i think its a big black thing with a round wiring connector or a round connector to plug the tester into as well as.And if my memory serves me well they are about 1000€ new unless you can find one in the scrapyard and i think some of them use the same one as a mercedes but dont quote me on this.Put a couple of these cars in the scrappers and never thought of taking off the modules ,just glad to get them out of the yard


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Might sound daft but do you have a bently manual as mine has the electrical diagram if not go to this site they might have what you need. plus have you checked the generator output fuses

Posted on Jul 11, 2009

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Replace the ignition switch.

Posted on Jun 28, 2009

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