The 67 ohm reading on #1 is not right. Snug up the 8 mm nut (do not over tighten) and measure again. Could also be corrosion on the wire crimp or solder joint on the large connector which can be inspected by removing the plastic cover.

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85 300D turbo pristine w 157k when purchased 167,870 July 2025
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked