{"product_id":"oem-goodman-16-pin-wiring-harness-for-gmnt120-5d-b1378700","title":"OEM Goodman 16-Pin Wiring Harness for GMNT120-5D — B1378700","description":"\u003cp\u003eThe \u003cstrong\u003eGoodman B1378700 16-Pin Wiring Harness\u003c\/strong\u003e is a genuine OEM control harness for \u003cstrong\u003eGMNT120-5D\u003c\/strong\u003e gas furnaces. This pre-terminated harness carries low-voltage and control signals between the integrated furnace control board and connected components through a keyed 16-pin connector. Melted connectors, corroded pins, chafed insulation, or intermittent no-heat faults traced to bad wiring are all reasons to install a fresh factory harness rather than splicing individual leads.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e B1378700\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnector:\u003c\/strong\u003e 16-pin keyed plug\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Furnace control wiring harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunction:\u003c\/strong\u003e Connects the control board to furnace components\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e Goodman GMNT120-5D furnace (verify against your unit)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Goodman (OEM)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003eOEM Goodman\u003c\/strong\u003e harness arrives with the correct 16-pin connector, wire gauges, colors, and lengths for true plug-and-play replacement — no crimping or re-pinning. A \u003cstrong\u003egeneric\u003c\/strong\u003e harness or a build-your-own repair costs less but risks mismatched connectors and wiring errors on a safety-critical circuit; for control wiring, the direct-fit OEM part is strongly recommended.\u003c\/p\u003e\u003ch3\u003eInstallation\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eDifficulty: Moderate to Difficult.\u003c\/strong\u003e Cut power at the breaker first. Photograph every connection, unplug the 16-pin connector and component leads, route the new harness along the original path, and reconnect. About 30–60 minutes; take care not to pinch wires against sharp sheet-metal edges.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058132074867,"sku":"GOODMAN-11769","price":18.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-16-pin-wiring-harness-for-gmnt120-5d-b1378700","provider":"National HVAC Parts","version":"1.0","type":"link"}