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how do you test for open/high resistance?

I am testing a circuit on my 08 traiblazer. The specs say that when you test for ground it should be less then 5 ohms, i test and it was 12ohms. The next step says test for open/high resistance. How do I do that? also i would like to add when i tested the ground i put the multi meter on 200 ohms(lowest setting) then one lead in the ground circuit and another lead on ground some where in the car, if that isnt right please let me know

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  • Jerry
    Lv 4
    7 years ago

    For checking continuity I use the 20K range.

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