I used a small piece of 22ga wire in the injector and wrapped the test lead. For the positive injector side I used the alternator housing to ground. FOr the neg injector side I used the 10ga wire coming straight off the starter the feeds the pos side of my cooling fan. I could double check using the power terminal on the alternator
Today I'm going to try grounding out terminal 52 on the black connector. This is the starter enabler. I found a couple threads on LS1 tech noting this helped when using EFI live (which is being used to tune)
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