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guage

1K views 1 reply 2 participants last post by  sedan delivery 
#1 ·
hey, wondering if someone knows how to check if an oil dash gauge is defective i disconnect the wire to the sending unit and gauge rises to max shouldnt i have to ground the wire first then it will max i changed the sending unit, just trying to see if these parts are defective before taking on the task of replacing my oil pump
 
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