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FasNuf · 10-11-2023, 06:28 PM

Since you have the ECM completely disconnected, see what pin 20 (FPCM conn,) to pin 50 (ECM conn) do with your meter and to ground. Pin 50 should be the grn/wht and shouldnt be grounded.

10-11-2023, 06:28 PM	#17
FasNuf Drives: 2014 Camaro ZL1 Join Date: Jul 2019 Location: Oregon Posts: 1,703 View My Garage	Since you have the ECM completely disconnected, see what pin 20 (FPCM conn,) to pin 50 (ECM conn) do with your meter and to ground. Pin 50 should be the grn/wht and shouldnt be grounded.