Standard Ignition SS-604 Diesel Glow Plug Relay

Diesel Glow Plug Relay for Ford Trucks

Standard Ignition SS-604 is a 12-volt diesel glow plug relay built for Ford E-350 Econoline, E-350 Econoline Club Wagon, F-250, F-350, E-250 Econoline Club Wagon, and F-150 applications listed below. It uses a 200-amp rating, male round connectors, and stud-style terminals to support reliable glow plug circuit control in diesel starting systems.

For buyers searching for a Ford F-250 glow plug relay or a diesel glow plug relay for Ford E-350 Econoline, SS-604 provides a direct replacement option with OE-style electrical connections and application-specific fitment.

Key Features

• 12-volt diesel glow plug relay for diesel starting systems
• 200-amp amperage rating for high-current glow plug control
• Male round connector design with 4 connectors
• Male stud terminals with 4 terminal positions
• Standard Ignition SS-604 replacement part number
• Fits multiple Ford truck and van applications from 1983-1994

Detailed Description

Standard Ignition SS-604 is an emission control relay used in diesel glow plug circuits to manage current flow during cold starts. The relay’s 12-volt design, 200-amp rating, and stud-terminal construction support dependable electrical transfer in older Ford diesel platforms. This part is listed for 1983-1994 Ford E-350 Econoline and E-350 Econoline Club Wagon, 1983-1994 Ford F-250, 1983-1993 Ford F-350, 1983-1991 Ford E-250 Econoline Club Wagon, and 1984 Ford F-150.

This part cross-references ACI 84010 for the same application.

What It Helps Solve

• Hard starting in cold weather on diesel engines
• Glow plugs not receiving proper relay-controlled power
• Intermittent no-start conditions related to the glow plug circuit
• Voltage drop or weak electrical transfer at the relay connection
• Relay failure in high-current diesel starting systems

Installation Notes and Tips

Verify connector style, terminal layout, and vehicle year before installation. Match the relay to the existing glow plug circuit wiring on the vehicle, and inspect terminals for corrosion, heat damage, or looseness before connecting the replacement. Confirm the application against the vehicle’s diesel engine configuration, especially on Ford E-350 Econoline, F-250, and F-350 models.

Quality Assurance

Standard Ignition manufactures ignition and starting system components with controlled production from raw materials through finished assembly. The brand uses high-grade materials and OE-focused manufacturing practices to support consistent electrical performance and service life.