Installed a Tremec Magnum XL in my S550

[Ruiner46]

Wiring my bowler harness now, where did you guys run your red power wire?

My buddy, who is a ford tech, and I don’t really understand why we can’t just use the ECM from the old connector other than the instructions clearly saying not to.

It's because that wire is just supposed to power a sensor with a tiny amount of current. The bowler harness draws more power than that wire (an output directly from the ECM) is designed to deliver.

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