Dorman 904-194 Diesel Glow Plug Relay

Dorman 904-194 Diesel Glow Plug Relay

Dorman 904-194 is a diesel glow plug relay built to match the fit and function of the original relay on specified vehicles. It is engineered for durable operation and reliable electrical performance in Ford diesel applications.

Key Features

• Direct replacement diesel glow plug relay for specified Ford vehicles
• 100 amp amperage rating for glow plug circuit control
• 4 blade terminals with male/female terminal design
• Bolt-on mounting style for secure installation
• Plastic cover construction
• Compact housing dimensions: 2.8 in. length, 2.8 in. width, 2.4 in. height

Detailed Description

This Dorman glow plug relay, part number 904-194, is designed for diesel starting systems that rely on controlled current delivery to the glow plugs. It matches the original relay’s fit and function for specified Ford trucks and vans, including Ford F-250, Ford F-350, Ford F-250 Super Duty, Ford F-350 Super Duty, Excursion, and E-350 Club Wagon applications. The relay uses a 4-terminal blade layout, a 100 amp rating, and a bolt-mounted design to support dependable electrical switching in the glow plug circuit. This part cross-references Standard Ignition RY-525 for the same application.

What It Helps Fix

• Hard starting on cold diesel engines
• Glow plugs not receiving proper power
• Intermittent or failed glow plug relay operation
• Extended cranking during cold-weather starts
• Electrical switching issues in the glow plug circuit

Installation Notes and Tips

• Fits 2003 Ford E-350 Club Wagon, N/A
• Fits 2000-2003 Ford Excursion, N/A
• Fits 1999-2003 Ford F-250 Super Duty, N/A
• Fits 1999-2003 Ford F-350 Super Duty, N/A
• Fits 1997 Ford F-250 HD, N/A
• Fits 1995-1997 Ford F-350, N/A
• Fits 1995-1996 Ford F-250, N/A

Verify terminal style, mounting location, and connector condition before installation. Confirm the relay matches the original electrical layout on your Ford diesel application, and inspect related wiring and glow plugs if starting concerns remain after replacement. Dorman 904-194 is a direct-fit service part for the listed vehicles.

Quality Assurance

Dorman designs this diesel glow plug relay to match original fit and function while focusing on durability and consistent performance. The part number 904-194 is built for specified Ford diesel applications and is backed by Dorman’s product engineering standards.