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The Goodman B1378700 16-Pin Wiring Harness is a factory-original wiring assembly for the APH1530M41AD packaged heat pump and compatible Goodman/Amana equipment. This harness carries the low-voltage and control signals between the unit's control board and its major components through a keyed 16-pin connector, with pre-terminated leads cut to length and color-coded to the factory schematic. It replaces harnesses damaged by heat, rodents, chafing, or corroded pins that cause intermittent faults and no-heat/no-cool complaints.
A genuine Goodman harness guarantees the correct pinout, wire gauge, and connector keying so it plugs directly into the board with no re-pinning. Building a harness from generic wire and connectors risks miswiring, voltage drop from undersized leads, and control-board damage. OEM is a true plug-and-play replacement.
Moderate — basic electrical experience helpful. Disconnect power, photograph the routing, unplug the old harness, and clip the new one in following the original path. No refrigerant work; a multimeter is useful for continuity verification.