I have read the manual on this... -hate to admit it but it mostly just confused me. I tested with a continuity tester from the wiring harness plug and none are an open circuit. But i understand that they can also fail as a short. The next test using power on and testing amperage as the GP heats up confuses me and I don't think I have the right tester nor a full understanding of how to use it. I'm pretty sure I have a couple of duds. anyone got a simple way of discerning which one(s) are the duds?

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Thanx,
Alberta Luthier
1983 300CD ('Stinky')155k miles, 2.47 diff, EGR removed, AAZ injectors with 265 nozzles from Sean,and vogtland lowering springs.
1984 300SD ('Old Blue')150k Klicks from Japan originally, came with rear head rests, no sunroof and never had an EGR