Stripped the interior and found that right behind the fuse box is completely rusted out... At first I got annoyed about having to pull all the wires but then I thought there
BMW Fuse Box Cover - E30, E24, E23 - 61131368802
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1983-1991 BMW E30 3-Series E24 Under Hood Electrical Fuse Box with Wiring OEM - 34891 - Prussian Motors