Complete Performance Engine Harness 02-03 Ford 7.3L Powerstroke
This product is vehicle-specific. Select your year, make, model, engine and transmission to confirm compatibility before adding it to your cart.
Select your truck to continue
Ships directly from the supplier. The final shipping cost will be shown before payment.
- Ships from Complete Performance
Electrical problems on a 7.3L Powerstroke can start small and quickly turn into constant frustration. Rough idle, injector misfires, random sensor issues, or hard starting are often caused by aging factory wiring that has been exposed to years of heat, oil, and vibration under the hood. When the engine harness begins to fail, communication between critical engine components becomes inconsistent, affecting both reliability and drivability.
This OEM-style F81Z-12B637-FA Engine Harness is designed specifically for 2002-2003 Ford F-Series 7.3L Powerstroke trucks, providing factory-correct fitment, routing, and connector placement. It restores proper communication between the injectors, sensors, and PCM to help eliminate intermittent electrical issues and bring back smooth, dependable engine performance. The durable construction is built to handle harsh engine bay conditions, while the plug-and-play design helps simplify installation, whether you’re repairing a problem truck or refreshing a high-mileage 7.3.
IMPORTANT FITMENT NOTE: Designed specifically for 2002-2003 Ford 7.3L Powerstroke trucks only. Please verify part number F81Z-12B637-FA before ordering and confirm compatibility with your truck’s emissions and transmission configuration, if applicable.
Electrical problems on a 7.3L Powerstroke can start small and quickly turn into constant frustration. Rough idle, injector misfires, random sensor issues, or hard starting are often caused by aging factory wiring that has been exposed to years of heat, oil, and vibration under the hood. When the engine harness begins to fail, communication between critical engine components becomes inconsistent, affecting both reliability and drivability.
This OEM-style F81Z-12B637-FA Engine Harness is designed specifically for 2002-2003 Ford F-Series 7.3L Powerstroke trucks, providing factory-correct fitment, routing, and connector placement. It restores proper communication between the injectors, sensors, and PCM to help eliminate intermittent electrical issues and bring back smooth, dependable engine performance. The durable construction is built to handle harsh engine bay conditions, while the plug-and-play design helps simplify installation, whether you’re repairing a problem truck or refreshing a high-mileage 7.3.
IMPORTANT FITMENT NOTE: Designed specifically for 2002-2003 Ford 7.3L Powerstroke trucks only. Please verify part number F81Z-12B637-FA before ordering and confirm compatibility with your truck’s emissions and transmission configuration, if applicable.
Diesel Power Products directs warranty claims to the respective manufacturer; coverage and duration depend on that manufacturer and product. Its one-year manufacturer-defect warranty applies only to products manufactured by Power Products Unlimited Inc., not all products it sells. Manufacturer inspection is required; DPP does not pay inspection/return shipping or labor.
Return and warranty information is based on what Diesel Power Products offers. Product-specific eligibility and the supplier’s published conditions apply; FullSpecDiesel does not add or extend coverage.
Diesel Power Products warranty policyView complete warrantyProduct conditions
Return and warranty information is based on what Diesel Power Products offers. Product-specific eligibility and the supplier’s published conditions apply; FullSpecDiesel does not add or extend coverage.
- Return eligibility
- Diesel Power Products states a 30-day window from receipt for eligible new, uninstalled, unopened and complete items in original packaging, with prior approval/RMA. Custom tuners and specified opened tools are excluded. Customer pays return shipping; original outbound shipping, including initially free shipping, is deducted. No standard restocking percentage is stated for ordinary approved returns. Based on what Diesel Power Products offers.
- Return window
- Not stated for this product; see supplier terms
- Restocking fee
- See supplier terms; no product-specific fee stated
- Return shipping
- Based on the supplier’s return policy; see terms
- Made to order
- No
- Backorder status
- Not backordered
- Cancellation
- Subject to supplier terms; contact FullSpecDiesel before requesting cancellation
- Warranty provider
- Diesel Power Products
- Warranty duration
- Product-specific duration not stated; see supplier terms
- Compatibility
- Listed for specific vehicle configurations
- Legal use
- Street legal
- Processing estimate
- 3–7 business days supplier processing
- Shipping
- Shipping calculated at checkout
- Signature
- No signature requirement
- Supplier
- Diesel Power Products
Product compatibility is based on the vehicle and product information provided. Review your selected truck, product options, measurements, modifications, and installation requirements before ordering.