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Thread: e21 electrical porblems after starter motor replacement

  1. #1
    Join Date
    Jan 2017
    Location
    lubbock, texas, usa
    Posts
    6
    My Cars
    1985 bmw e30 325e

    e21 electrical porblems after starter motor replacement

    after replacing the starter motor in my 83 e21 i ran into some serious electrical issues. i believe its a grounding problem somewhere. when putting the car back together i connected the battery to test the new motor, i just wanted to see if it would crank, sparks flew from the grounds near the the driver side fender and began to glow red hot. the only time i dont have sparks fly is when i pull off the engine ground. even then i have no crank. any suggestions? ive checked all the grounds. in the process of replacing the new starter i took off the intake manifold, alternator, and brake booster with everything else attached.( i know that an unnecessary amount of parts to remove but i ran into more trouble with stripped Allen bolts). is there something obvious that im missing?

  2. #2
    Join Date
    Apr 2014
    Location
    DFW TX USA
    Posts
    1,447
    My Cars
    1983 320I, 1986 325E
    Use this electrical troubleshooting manual to diagnose your problem. https://web.archive.org/web/20161231..._1981-1983.pdf

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