{"product_id":"oem-goodman-5-pin-wiring-harness-for-gmp075-4-b1378701","title":"OEM Goodman 5-Pin Wiring Harness for GMP075-4 — B1378701","description":"\u003ch2\u003eGoodman B1378701 5-Pin Wiring Harness\u003c\/h2\u003e\u003cp\u003eThe Goodman \u003cstrong\u003eB1378701\u003c\/strong\u003e is a genuine OEM 5-pin wiring harness designed as a direct-fit replacement for the \u003cstrong\u003eGMP075-4\u003c\/strong\u003e gas furnace. This compact connector harness carries low-voltage signals between the furnace control board and key components such as the ignitor, flame sensor, or pressure switch circuit. Age, heat, and vibration can degrade the original connector, leading to intermittent operation, nuisance lockouts, or a furnace that fails to ignite. Installing a fresh OEM harness eliminates these connection faults and returns the unit to dependable service.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e B1378701\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnector:\u003c\/strong\u003e 5-pin plug\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFit:\u003c\/strong\u003e Goodman GMP075-4 gas furnace\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Low-voltage control wiring harness\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\u003egenuine Goodman OEM harness\u003c\/strong\u003e matches the factory connector keying and pin assignments exactly, so it seats without splicing, crimping, or guesswork. Generic universal harnesses frequently require field modification and can introduce wiring errors that damage the control board. Choosing OEM protects your equipment and preserves warranty coverage.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy to Moderate.\u003c\/strong\u003e With power disconnected at the breaker, unplug the old keyed connector and snap the new harness into place. Photograph the routing first to ensure correct orientation. Typical install time is 15–20 minutes for a confident DIYer.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eAlways shut off electrical power and gas supply before servicing your furnace.\u003c\/em\u003e\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058135646579,"sku":"GOODMAN-11856","price":11.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-5-pin-wiring-harness-for-gmp075-4-b1378701","provider":"National HVAC Parts","version":"1.0","type":"link"}