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1. The gray plug in the top right looks correct, but my OEM harness plug was up behind the fuel pedal. Here is a picture of the pigtail for the Tekonsha.
3. Harness connector for Ford Auxiliary Powertrain Control Module, aka APCM, aka Auxiliary Idle Control, aka AIC. The APCM is used for trucks with PTO transmissions, and enables the operator to elevate and modulate engine speed while stationary.
