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  1. E39 (1997 - 2003)
    I realize there is Final Stage Unit/Final Stage Resistor (FSU/FSR) information all over the place (see references below) - so - I would like to open this thread solely to discuss one topic - which is: - HOW TO BUILD A TEST JIG TO TEST FSU OPERATION ON THE TEST BENCH Here is my first pass...
  2. E39 (1997 - 2003)
    If you have a plastic & aluminum FSU handy - does it show continuity to the spikes? This thread is, I guess, looking for a yes or no answer ... A perplexing question came up in my mind because I could have sworn I tested continuity in February 2009 between the heat-sink spikes (fins) and the...
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