Standard Ignition RY-402 Engine Control Module Relay

Engine Control Module Relay for Select Mitsubishi and Dodge

Standard Ignition RY-402 is an engine control module relay built for 12-volt systems with a 10 amp amperage rating. It features a female 2-connector square housing, male blade terminals, and an included mounting bracket for a secure OE-style installation.

Key Features

• Engine Control Module (ECM) relay for automotive electrical systems
• 12 V voltage rating with 10 A amperage rating
• Female 2-connector square design
• Male blade terminals, 9 terminal quantity
• Mounting bracket included
• Standard Ignition RY-402 replacement part

Detailed Description

Standard Ignition RY-402 is an ECM relay used in the engine management circuit to control power delivery to the vehicle’s electronic control module. This relay is a direct-fit electrical service part for select Dodge Stealth, Mitsubishi 3000GT, and Mitsubishi Diamante applications, including 1991-1993 Mitsubishi 3000GT, 1991-1993 Mitsubishi 3000GT with 4 Wheel Steering, 1992-1993 Mitsubishi Diamante, and 1991-1996 Dodge Stealth. The RY-402 part number is also referenced by several interchange numbers for cross-checking during repair planning.

This part cross-references Eastern Catalytic 20471 for the same application.

Vehicle Fitment

• Fits 1995-1996 Dodge Stealth, N/A
• Fits 1991-1993 Dodge Stealth, N/A
• Fits 1994 Dodge Stealth, N/A, OE No. E8T07871
• Fits 1991-1993 Mitsubishi 3000GT, N/A
• Fits 1991-1993 Mitsubishi 3000GT, N/A, w/ 4 Wheel Steering
• Fits 1992-1993 Mitsubishi Diamante, N/A

What It Helps Address

• Intermittent ECM power loss
• No-start conditions related to relay failure
• Electrical relay chatter or inconsistent module power
• Engine control communication issues caused by relay faults
• Replacement of a worn or heat-damaged factory relay

Installation Notes and Tips

Verify connector shape, terminal count, and mounting location before installation. Confirm the vehicle uses a 12-volt ECM relay with a 10 amp rating and compare the original relay number, including OE No. E8T07871 where applicable. Standard Ignition RY-402 uses blade terminals and a bracketed mounting style, so the existing harness and bracket location should match the original configuration.

Quality Assurance

Standard Ignition supplies electrical replacement parts for service applications, and this relay is built to match the specified connector, terminal, and voltage requirements for the listed vehicles. Standard Ignition RY-402 is a direct replacement reference for the confirmed fitment shown above.