Wiring Question LS1 PCM

Discussion in 'High Tech Retrofits' started by JJFarmer, May 28, 2010.

  1. JJFarmer

    JJFarmer Veteran Member

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    Does the check engine light PCM wire put out 12v (+) or is it a ground (-) to turn the light on when needed? I got ready to wire it in and I didn't have any info on it
     
  2. Aceshigh

    Aceshigh Veteran Member Lifetime Gold Member

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    Go on LS1tech and PM John Speartech.

    I don't know, but I know he does.
     
  3. drptop70ss

    drptop70ss Veteran Member

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    Normally the ecm will supply the ground, works that way with my LT1 setups, should be the same with LS1.
     
  4. JJFarmer

    JJFarmer Veteran Member

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    Well, I wired it in as a ground and got a light ....so...I guess it is a ground.
     
    Last edited: May 29, 2010

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