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horn or siren

  1. BMW 3 Series Forum - Technical Talk on the BMW E21
    I'm about to fit a police horn that I aquired when I was in T'bilisi, Georgia. This thing is awesome. Can be heard from about half a mile!!! :D Anyway I need to know how to get the wires from the boot/engine bay into the cabin. I need to run the 2 power wires from the battery to the control box...