Dorman 904-412 Diesel Glow Plug Wiring Harness - Left

Reliable Diesel Glow Plug Wiring Harness for Ford Super Duty

The Dorman 904-412 Diesel Glow Plug Wiring Harness is designed specifically for Ford F-250 Super Duty and F-350 Super Duty models. This harness ensures proper electrical connectivity for your diesel engine's glow plugs, supporting efficient cold starts and engine performance.

• Length: 16 inches for precise fitment
• Color: Black for seamless integration
• Insulator Material: Durable Teflon for heat resistance
• Terminal Type: Male blade terminals made of copper
• Wire Core Material: Copper with 17 gauge wire for reliable conductivity
• Wire Quantity: 4 wires to match factory specifications
• Specific fitment for Ford F-250 and F-350 Super Duty models

Durable Construction and Precise Fitment

The Dorman 904-412 harness features a Teflon insulator material that withstands high temperatures commonly found in diesel engine compartments. Copper wire cores and terminals provide excellent electrical conductivity and corrosion resistance. The 17 gauge wire size and four-wire configuration match the original equipment specifications, ensuring compatibility and reliable performance. This harness is designed specifically for Ford F-250 Super Duty and F-350 Super Duty trucks, providing a direct replacement that maintains factory standards.

Applications and Common Issues Addressed

• Restores proper glow plug electrical connections in diesel engines
• Eliminates intermittent glow plug failures due to wiring damage
• Prevents cold start difficulties related to faulty harnesses
• Replaces worn or corroded wiring harnesses in Ford Super Duty trucks
• Supports consistent engine starting performance in low temperatures

Installation Notes and Tips

Installation of the Dorman 904-412 Diesel Glow Plug Wiring Harness requires basic automotive electrical knowledge. Ensure the vehicle is turned off and the battery is disconnected before beginning. Carefully remove the old harness and compare it to the new part to confirm fitment. Connect the male blade terminals securely to the glow plugs and the vehicle’s wiring system. Avoid sharp bends or pinching of the wires during installation to maintain harness integrity.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards. The 904-412 Diesel Glow Plug Wiring Harness undergoes rigorous quality checks to ensure durability and performance. While specific warranty details may vary, Dorman typically offers a limited warranty covering defects in material and workmanship. Refer to the product packaging or Dorman’s official documentation for exact warranty terms.