Glad you got it figured out. How did you check the ohms? If you check each plug at the plug without disconnecting the harness from the relay you can get false ohm readings since all the plugs are connected to the hot wire inside the relay and hence to each other.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13