CEL, GMPP harness for LS3 - Lateral-g Forums

07-28-2016, 12:21 PM

DT69Cam

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CEL, GMPP harness for LS3

Does anyone know if the "Check Engine Light" on the GMPP LS3 harness is triggered by a negative source ?? My new gauges CEL needs a positive trigger for the light to turn on. I know I need a relay to convert from neg to positive. I just wanted to confirm the negative source for the CEL. Thx.

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69 Camaro Convertible (LS3/TKO in the works)

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