Standard Ignition RY-627 Headlight Dimmer Switch Relay

Headlight Dimmer Switch Relay for Toyota and Lexus

Standard Ignition RY-627 is a 12-volt headlight dimmer switch relay used in daytime running lamp relay applications. It is built with a square female connector, four male blade terminals, and a 20 amp amperage rating for direct replacement service on a wide range of Toyota, Lexus, and select Geo models.

Use this relay when you need a replacement for Toyota Camry, Avalon, Tacoma, 4Runner, and Lexus GS300 or RX300 lighting circuits that rely on a 4-terminal relay layout. Standard Ignition RY-627 is also cross-referenced to Baldwin 20004 for the same application.

Key Features

• Part number: RY-627
• Function: daytime running lamp relay
• 12 V electrical system application
• 20 A amperage rating
• Square female connector with 1 connector cavity
• 4 male blade terminals
• Relay included as the contents
• No mounting bracket included

Detailed Description

Standard Ignition RY-627 is an electrical relay designed for headlight dimmer switch and daytime running lamp circuits. The relay uses a square connector style with four blade terminals, making it a direct-fit service part for many Toyota and Lexus platforms that specify this configuration. Common fitments include 1985-2017 Toyota Camry, 1995-2010 Toyota Avalon, 1995-2004 Toyota Tacoma, 1987-2002 Toyota 4Runner, 1993-2006 Lexus GS300, and 1999-2003 Lexus RX300. The part number RY-627 is also listed for select Lexus GS350, GS430, IS300, and Toyota Land Cruiser, Prius, Solara, Tundra, and Sienna applications.

This relay cross-references Baldwin 20004 for the same application.

What It Helps Fix

• Inoperative daytime running lamps
• Headlight dimmer relay failure
• Intermittent lighting relay operation
• No-start or no-output conditions caused by a failed relay in the lighting circuit
• Relay-related lighting faults on Toyota and Lexus vehicles

Installation Notes and Tips

• Verify the connector shape, terminal count, and terminal style before installation.
• Confirm the vehicle uses a 12 V relay with a 20 A rating and a 4-terminal layout.
• Check the relay location against the vehicle’s service information, especially on models with multiple relay positions or notes such as No. 1, No. 2, No. 3, or No. 4.
• Inspect the relay socket for heat damage, corrosion, or loose terminals before installing the replacement.
• Match the application carefully on Toyota Camry, Toyota 4Runner, and Lexus RX300 lighting systems to ensure correct relay placement.

Quality Assurance

Standard Ignition replacement electrical components are cataloged for direct application matching across listed vehicle platforms. RY-627 is specified by connector type, terminal layout, voltage, and amperage rating to support accurate relay replacement on confirmed fitments.