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The Goodman B1378701 is a genuine OEM 5-pin wiring harness designed as a direct-fit replacement for the AEPF183016CA air handler. This smaller harness links a sub-circuit — such as the motor or accessory connection — to the main control board. Damaged pins, brittle insulation, or a burnt connector cause intermittent faults and nuisance lockouts. A fresh OEM harness restores a solid, factory-spec connection.
The 5-pin connector is keyed to prevent reversed installation and matches the original gauge and routing exactly.
OEM (this part): Exact pin-out and keying for a true plug-and-play swap, no splicing. Generic: Universal harnesses force you to cut and crimp, increasing the chance of a miswire. For a 5-pin control harness, OEM keeps the repair clean and code-correct.
Easy. Unplug both ends of the old harness, route the replacement the same way, and click each connector home. Minimal tools required. Allow 10–20 minutes. Always disconnect power first.