Engine Wiring Harness 4C3Z12B637CA for 6.0L Powerstroke Ford F250
4C3Z-12B637-CA Engine Wire Harness for Ford Excursion 2004 6.0L
EGR Performance Wiring Harness for 2004 Ford F350 6.0L Powerstroke
6.0L Powerstroke Engine Wiring Harness 4C3Z12B637CA
Replacement Engine Wiring Harness for Ford F450 F550 2004 6.0L
Engine Wiring Harness 4C3Z12B637CA for 6.0L Powerstroke Ford F250
4C3Z-12B637-CA Engine Wire Harness for Ford Excursion 2004 6.0L
EGR Performance Wiring Harness for 2004 Ford F350 6.0L Powerstroke
6.0L Powerstroke Engine Wiring Harness 4C3Z12B637CA
Replacement Engine Wiring Harness for Ford F450 F550 2004 6.0L

Engine Wiring Harness for 6.0L Powerstroke Ford F250-F550/Excursion 2004

$237.89
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Details
Year
Vehicle
Engine
Part Numbers
Note
2004
Ford F250/F350/F450/F550 Super Duty
6.0L Powerstroke Diesel
4C3Z12B637CA, 4C3Z-12B637-CA
Build After 9/23/03
2004
Ford Excursion
6.0L Powerstroke Diesel
4C3Z12B637CA, 4C3Z-12B637-CA
No build date limit
The Engine Wiring Harness (4C3Z12B637CA) is a premium replacement part designed specifically for 2004 Ford 6.0L Powerstroke Diesel engines, including F250-F550 Super Duty (build dates after 9/23/03) and Excursion, ensuring stable signal transmission and optimal engine performance.
Shipping Details

Ontario CA / Springdale OH / Newark NJ
Package List
  • 1x Engine Wiring Harness Assembly (matches part numbers 4C3Z12B637CA / 4C3Z-12B637-CA)
Delivery Time

2-5 working days inland in the United States

Product details

Product Overview

This Engine Wiring Harness from EGR Performance is a direct OE replacement for part numbers 4C3Z12B637CA and 4C3Z-12B637-CA. Engineered for 2004 Ford F250, F350, F450, F550 Super Duty (with build dates after 9/23/03) and Ford Excursion, all equipped with the 6.0L Powerstroke Diesel engine, it serves as a reliable replacement for worn, cracked, or faulty factory wiring harnesses.Crafted from high-quality materials with a high-conductivity copper core and flame-retardant insulation layer, this wiring harness offers exceptional durability, wear resistance, corrosion resistance, and high-temperature tolerance (operating range -40℃ to +125℃) with IP67 waterproof and dustproof performance. It is 100% tested before shipping to ensure safety, stability, and durability, backed by a 1-year warranty and dedicated customer support (service@egrperformance.com) for added peace of mind.

Ideal For

  • 2004 Ford F250 Super Duty with 6.0L Powerstroke Diesel (build dates after 9/23/03)
  • 2004 Ford F350 Super Duty with 6.0L Powerstroke Diesel (build dates after 9/23/03)
  • 2004 Ford F450 Super Duty with 6.0L Powerstroke Diesel (build dates after 9/23/03)
  • 2004 Ford F550 Super Duty with 6.0L Powerstroke Diesel (build dates after 9/23/03)
  • 2004 Ford Excursion with 6.0L Powerstroke Diesel
  • Vehicle owners dealing with wiring harness issues (e.g., vehicle failure to start, unstable engine operation, poor performance)
  • DIY enthusiasts and professional mechanics seeking an easy-to-install, direct replacement wiring harness
  • Those needing a direct OE replacement matching part numbers 4C3Z12B637CA or 4C3Z-12B637-CA
  • Drivers looking to restore stable engine signal transmission and prevent further engine damage from faulty wiring

Core Advantages

  • OE-Compliant Fit: Directly replaces OE part numbers 4C3Z12B637CA and 4C3Z-12B637-CA, ensuring seamless compatibility with 2004 Ford 6.0L Powerstroke models (F250-F550 Super Duty 9/23/03+, Excursion).
  • Premium Quality Materials: Made of high-conductivity copper core and flame-retardant insulation, featuring wear resistance, corrosion resistance, high-temperature tolerance, and IP67 waterproof/dustproof performance for long-term use.
  • Plug-and-Play Installation: Designed for easy, tool-free installation (no complicated tools required), plug-and-play design allows for direct use without modifications, saving time and effort.
  • 100% Pre-Shipped Testing: Each wiring harness is fully tested before shipping to ensure stable performance, safety, and durability, reducing the risk of installation issues.
  • Direct Replacement: Perfectly replaces old, worn, or broken factory wiring harnesses, restoring stable signal transmission and preventing engine performance issues caused by faulty wiring.
  • 1-Year Warranty: Backed by EGR Performance with a 1-year warranty, offering protection against manufacturing defects and dedicated customer support via service@egrperformance.com.

Technical Specifications

  • Brand: EGR Performance
  • Product Type: Engine Wiring Harness Assembly
  • Material: High-Conductivity Copper Core + Flame-Retardant Insulation
  • Reference Part Numbers: 4C3Z12B637CA, 4C3Z-12B637-CA
  • Fitment: 2004 Ford F250-F550 Super Duty (6.0L Powerstroke, build dates after 9/23/03); 2004 Ford Excursion (6.0L Powerstroke)
  • Operating Range: -40℃ to +125℃
  • Protection Level: IP67 (Waterproof & Dustproof)
  • Installation: Plug-and-play; no installation instructions included; professional installation recommended
  • Warranty: 1 Year
  • Application: Replaces worn/faulty engine wiring harnesses to ensure stable signal transmission, prevent engine performance issues, and restore optimal engine operation.

Why Choose This Engine Wiring Harness (4C3Z12B637CA)?

The engine wiring harness is a critical component of your 6.0L Powerstroke engine, responsible for transmitting electrical signals between the engine’s electronic modules and sensors. A faulty wiring harness can cause severe issues, including vehicle failure to start, unstable engine operation (shaking, abnormal noise), reduced power, increased fuel consumption, and delayed throttle response – all of which can lead to further engine damage if not addressed promptly.This EGR Performance Engine Wiring Harness solves these problems with its premium construction and OE-compliant design. Unlike generic wiring harnesses, it is specifically tailored for 2004 Ford 6.0L Powerstroke models (F250-F550 Super Duty 9/23/03+, Excursion), ensuring a perfect fit without modifications. Its high-conductivity copper core and flame-retardant insulation ensure stable signal transmission, while IP67 protection and high-temperature tolerance make it durable in harsh automotive environments.With plug-and-play installation, 100% pre-shipped testing, and a 1-year warranty, this wiring harness offers convenience, reliability, and peace of mind. Whether you’re a DIY enthusiast or a professional mechanic, it’s the ideal choice for restoring your engine’s performance and preventing costly repairs from faulty wiring.

Important Notes

  • Inspect Compatibility: Verify your vehicle’s year, model, engine, and (for F250-F550) build date (after 9/23/03) before installation to ensure a proper fit.
  • No Installation Instructions: This wiring harness does not include installation instructions – professional installation is recommended to ensure correct wiring and avoid electrical damage.
  • Regular Maintenance: Periodically inspect the wiring harness for cracks, wear, or loose connections to maintain stable performance and extend its service life.
  • Professional Assistance: Seek professional help for installation or troubleshooting if you are unsure about the process, to avoid improper wiring and potential engine damage.

Compatibility List

ThisEngine Wiring Harness (4C3Z12B637CA) is fully compatible with the following 2004 Ford models equipped with the 6.0L Powerstroke Diesel engine:

  • 2004 Ford F250 Super Duty 6.0L Powerstroke Diesel (Build Dates After 9/23/03)
  • 2004 Ford F350 Super Duty 6.0L Powerstroke Diesel (Build Dates After 9/23/03)
  • 2004 Ford F450 Super Duty 6.0L Powerstroke Diesel (Build Dates After 9/23/03)
  • 2004 Ford F550 Super Duty 6.0L Powerstroke Diesel (Build Dates After 9/23/03)
  • 2004 Ford Excursion 6.0L Powerstroke Diesel
  1. Dispatch Time: Orders will be shipped within 24 hours after successful payment.
  2. Delivery Time: 2-5 business days after dispatch (delivery speed depends on proximity to warehouse location).
  3. Return Window:7 days for unsatisfactory items45 days for quality-related issues
  4. Refund Processing: Refunds will be processed back to your original payment method within 2-4 business days after receiving the automated refund confirmation email (subject to bank verification).
  • Q: Will this 4C3Z12B637CA Engine Wiring Harness fit my 2004 Ford F350 6.0L Powerstroke built on 10/15/2003?

    A: Yes! This wiring harness is compatible with 2004 Ford F350 Super Duty 6.0L Powerstroke models with build dates after 9/23/03, including your 10/15/2003 model, ensuring a direct OE-compatible fit.
  • Q: Does this harness replace part number 4C3Z-12B637-CA?

    A: Yes! This Engine Wiring Harness is a direct replacement for both 4C3Z12B637CA and 4C3Z-12B637-CA, matching OE specifications perfectly for 2004 Ford 6.0L Powerstroke models.
  • Q: Is installation instruction included with the wiring harness?

    A: No, installation instructions are not included. Professional installation is recommended to ensure correct wiring and avoid damage to your 6.0L Powerstroke engine’s electrical system.
  • Q: What materials are used in this engine wiring harness?

    A: It features a high-conductivity copper core and flame-retardant insulation, with IP67 waterproof/dustproof performance, wear resistance, corrosion resistance, and a high-temperature tolerance of -40℃ to +125℃.
  • Q: Will this harness fit my 2004 Ford Excursion 6.0L Powerstroke?

    A: Yes, this Engine Wiring Harness is fully compatible with 2004 Ford Excursion models equipped with the 6.0L Powerstroke Diesel engine, with no build date restrictions.
  • Q: What is included in the package?

    A: The package includes 1x Engine Wiring Harness Assembly that matches part numbers 4C3Z12B637CA and 4C3Z-12B637-CA.
  • Q: What warranty is included with this 4C3Z12B637CA wiring harness?

    A: This wiring harness comes with a 1-year warranty from EGR Performance. For warranty claims or support, contact our customer service at service@egrperformance.com.
  • Q: Can I install this wiring harness myself, or do I need a professional mechanic?

    A: While the harness features a plug-and-play design, professional installation is recommended. Proper wiring ensures stable signal transmission and prevents electrical shorts or engine damage – a qualified mechanic can ensure a secure, correct fit.
  • Q: How does a faulty engine wiring harness affect my 6.0L Powerstroke’s performance?

    A: A faulty wiring harness causes unstable signal transmission, leading to vehicle failure to start, engine抖动,异响, reduced power, increased fuel consumption, delayed throttle response, and potential engine damage if not replaced promptly.
  • Q: Is this wiring harness waterproof and dustproof?

    A: Yes! It has an IP67 protection level, providing excellent waterproof and dustproof performance to withstand harsh automotive environments and extend service life.
  • Q: Will this harness work with a 2004 Ford F250 built on 8/10/2003?

    A: No, this wiring harness is only compatible with 2004 Ford F250 Super Duty 6.0L Powerstroke models with build dates after 9/23/03. Please verify your vehicle’s build date before purchasing.
  • Q: Is this a direct OE replacement for the factory wiring harness?

    A: Yes! This Engine Wiring Harness is a direct OE replacement for 4C3Z12B637CA and 4C3Z-12B637-CA, matching all OE specifications for fit, performance, and durability.
  • Q: How often should I inspect the wiring harness for maintenance?

    A: We recommend periodically inspecting the harness for cracks, wear, or loose connections to maintain stable performance and prevent premature failure – this is especially important for vehicles used in harsh conditions.