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The Goodman B1378700 is a genuine OEM 16-pin wiring harness built for the APC1560H41AB packaged air conditioner. This harness carries control and power signals between the unit's main control board and its components through a keyed 16-position connector. Rodent damage, melted insulation, corroded pins, or intermittent control faults are all signs of a failing harness. Replacing it restores reliable, plug-and-play connections without splicing or guesswork.
OEM harnesses use the correct pin count, wire gauge, color coding, and connector keying so the plug seats only one way and matches the board pinout exactly. Generic harnesses risk mismatched terminals and shorts. For control wiring, genuine Goodman is strongly recommended.
Easy — Typically a 15–30 minute swap. Disconnect power, photograph the routing, unplug the 16-pin connector and any inline terminals, route the new harness along the original path, and reconnect. No splicing required for a plug-and-play replacement.