What are the specs for this Wiring Harness?

The correct replacement for Goodman model GMV81155CXBA — B1378702 is this exact part. It is the factory-specified replacement with exact OEM specifications. Using a part with different specifications can cause equipment damage or void your warranty. You can verify this by checking the data plate on your Goodman equipment which lists the model number GMV81155CXBA — B1378702.

What symptoms indicate I need a new wiring harness?

Common symptoms that indicate you need a new wiring harness include unusual noises, intermittent operation, complete failure to operate, or visible damage. For specific diagnostic guidance, visit nationalhvacparts.com/pages/hvac-diagnostic.

Is this wiring harness compatible with Bryant or Payne systems too?

Many Goodman parts are cross-compatible with Bryant and Payne systems since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across multiple brand labels with different model numbers. To verify cross-compatibility, check your Bryant or Payne equipment service manual for cross-compatible part numbers, or contact info@nationalhvacparts.com with your model number for confirmation.

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Goodman

OEM Goodman ECM Motor Power Harness for GMV81155CXBA — B1378702

Name: OEM Goodman ECM Motor Power Harness for GMV81155CXBA — B1378702
Brand: Goodman
SKU: GOODMAN-B1378702
Price: 34.95 USD
Availability: InStock

SKU: GOODMAN-B1378702 Brand: Goodman

$34.95 $44.95

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Texas CMBL #19328542014

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The Goodman B1378702 ECM Motor Power Harness is the genuine OEM wiring harness that delivers line-voltage power to the variable-speed ECM blower motor in your Goodman GMV81155CXBA 80% AFUE two-stage furnace (115,000 BTU input). When the blower runs intermittently, will not start, or throws motor-communication faults, a cracked connector or heat-damaged harness is a common and inexpensive culprit. Installing the factory harness restores a clean, keyed connection to the motor.

Specifications

Part number: B1378702
Type: ECM blower motor power harness
Application: Variable-speed ECM (X13/constant-torque) blower assemblies
Fits: Goodman GMV81155CXBA and compatible GMV8-series furnaces
Connector: Keyed OEM plug — no splicing or crimping required

OEM vs. Generic

This is the factory OEM harness, molded with the correct keyed connector, gauge, and lead length. Generic universal harnesses require cutting and splicing, may not seat fully into the motor plug, and can introduce voltage-drop or intermittent-connection faults on a sensitive ECM motor. For a variable-speed system, we strongly recommend the exact OEM part.

Installation Difficulty

Easy (1 of 5). Shut off power at the furnace disconnect, unplug the old harness at the motor and control board, and seat the new one in the same orientation. Typically a 10–15 minute job. Always confirm power is off before servicing.

Compatibility note: verify your model and serial tag before ordering. If you are unsure this part fits, contact us at info@nationalhvacparts.com.

Shipping Information

Orders placed before 3PM CST ship same business day
Standard delivery: 2-5 business days
Express shipping available at checkout
Free shipping on orders over $75
Tracking number emailed upon shipment

Return Policy

30-day returns on unused parts in original packaging
Electrical parts (capacitors, contactors, control boards) are final sale once installed
Email info@nationalhvacparts.com to initiate a return
Refunds processed within 5-7 business days

OEM Goodman ECM Motor Power Harn...

$34.95

Frequently Asked Questions

Does this Wiring Harness fit my Goodman GMV81155CXBA — B1378702?

Yes. This is the factory-specified OEM wiring harness for the Goodman GMV81155CXBA — B1378702. It is a direct drop-in replacement that fits without modification. Always verify the model number on your equipment nameplate before ordering.

How do I replace the wiring harness on my Goodman GMV81155CXBA — B1378702?

Refer to your equipment service manual for model-specific steps. General approach: turn off power, photograph connections, remove old part, install new part, restore power and test. For gas components, hire a licensed technician. Email info@nationalhvacparts.com for guidance.

What symptoms mean I need a new wiring harness?

Common symptoms: unusual noises, intermittent operation, complete failure, or visible damage. Visit our diagnostic hub for symptom-based troubleshooting.

Is this wiring harness compatible with Bryant or Payne too?

Many Goodman parts are cross-compatible with Bryant and Payne since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across brand labels with different model numbers. To verify: check your Bryant or Payne equipment service manual for cross-compatible part numbers, or email info@nationalhvacparts.com with your model number.

Should I use OEM or aftermarket for my Goodman wiring harness?

OEM recommended for reliability and warranty compatibility. OEM parts match exact factory specifications for proper fit, performance, and safety. While aftermarket alternatives cost less upfront, the risk of improper fit and reduced lifespan usually makes OEM the better value long-term.

How fast does National HVAC Parts ship?

Orders placed before 3:00 PM CST ship the same business day. Standard delivery is 2–5 business days anywhere in the continental United States. Express shipping available at checkout. We ship from Houston, TX to all 50 states. 30-day return policy on all parts.

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