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Standard Ignition RY-556 Headlight Dimmer Switch RelayOE Quality 60-Day Returns
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Part #: RY-556

Standard Ignition RY-556 Headlight Dimmer Switch Relay

⚙️ 176 vehicles fit this part
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🚗Fitment: Toyota and Lexus, MR2 Spyder, Prius, Solara, Tacoma, Tundra, ES300, LS430, Camry, Corolla, LS400, Avalon, Tercel, T100, Paseo, Previa, RAV4, 4Runner, Cressida, ES250, and Celica
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Reliable Headlight Dimmer Switch Relay for Lexus and Toyota Vehicles

The Standard Ignition RY-556 headlight dimmer switch relay is designed to provide consistent electrical performance for various Lexus and Toyota models. Engineered to meet OEM specifications, this 12-volt relay supports your vehicle's lighting and air conditioning control systems effectively.

  • Amperage rating of 20 amps for stable electrical flow
  • Female rectangular connector with one connection point
  • Four male blade terminals for secure wiring
  • Compatible with 12-volt electrical systems
  • Designed for use as a headlight dimmer switch relay and air condition control relay

Technical Details and Compatibility

The Standard Ignition RY-556 relay operates at 12 volts and supports a continuous duty rating of no, making it suitable for intermittent use in headlight dimmer circuits and air conditioning control. It features a female rectangular connector with one connector quantity and four male blade terminals, ensuring proper fit and electrical contact. This relay does not include mounting hardware or brackets and has no mounting holes, so installation requires securing it with existing vehicle mounts or custom solutions.

This relay is compatible with a wide range of Lexus and Toyota vehicles, including popular models such as the Lexus ES250, ES300, LS400, LS430, and Toyota Camry, Corolla, 4Runner, Tacoma, Prius, RAV4, and MR2 Spyder. The RY-556 part number ensures you receive the correct relay for your vehicle’s electrical system.

Common Applications and Issues Addressed

  • Restores proper function to headlight dimmer switches in Lexus and Toyota vehicles
  • Resolves intermittent or non-functioning headlight dimming issues
  • Supports air conditioning control relay functions to maintain system reliability
  • Prevents electrical failures caused by faulty or worn relays
  • Ensures consistent voltage delivery to lighting and HVAC components

Installation Notes and Tips

When installing the Standard Ignition RY-556 relay, verify the connector orientation and terminal alignment to match your vehicle’s wiring harness. Since mounting hardware and brackets are not included, use existing mounting points or secure the relay with appropriate fasteners to prevent vibration damage. Always disconnect the battery before installation to avoid electrical shorts or damage.

Quality Assurance and Warranty

Standard Ignition parts are manufactured to meet or exceed OEM standards, ensuring reliable performance and durability. The RY-556 relay undergoes rigorous testing to confirm electrical specifications and fitment accuracy. Please refer to Standard Ignition’s warranty policy for coverage details on this headlight dimmer switch relay.

BrandStandard Ignition
Part NumberRY-556
Amperage Rating20 A
Connector GenderFemale
Connector ShapeRectangular
ContentsRelay
Continuous DutyNo
FunctionsRelay
Mounting Bracket(s) IncludedNo
Terminal GenderMale
Terminal TypeBlade
Voltage12

This part fits 176 vehicles. Search below:

YearMakeModelSubmodelLitersCylindersPositionNotes
2005ToyotaMR2 SpyderN/A
2004ToyotaMR2 SpyderN/A
2003ToyotaMR2 SpyderN/A
2003ToyotaMR2 Spyder1.8LL4N/A
2003ToyotaPrius1.5LL4N/A
2002ToyotaMR2 Spyder1.8LL4N/A
2002ToyotaMR2 SpyderN/A
2002ToyotaPrius1.5LL4N/A
2002ToyotaSolara2.4LL4N/A
2002ToyotaSolara3.0LV6N/A
2002ToyotaTacoma3.4LV6N/A
2002ToyotaTacoma2.7LL4N/A
2002ToyotaTacoma2.4LL4N/A
2002ToyotaTundra3.4LV6N/A
2002ToyotaTundra4.7LV8N/A
2001LexusES300N/A
2001LexusLS430N/A
2001ToyotaCamry3.0LV6N/A
2001ToyotaCamry2.2LL4N/A
2001ToyotaCorollaN/A
2001ToyotaCorolla1.8LL4N/A
2001ToyotaMR2 Spyder1.8LL4N/A
2001ToyotaMR2 SpyderN/A
2001ToyotaPrius1.5LL4N/A
2001ToyotaSolara2.2LL4N/A
2001ToyotaSolara3.0LV6N/A
2001ToyotaTacoma2.7LL4N/A
2001ToyotaTacoma3.4LV6N/A
2001ToyotaTacoma2.4LL4N/A
2001ToyotaTundra4.7LV8N/A
2001ToyotaTundra3.4LV6N/A
2000LexusLS400N/A4 Term.
2000ToyotaCamry3.0LV6N/A
2000ToyotaCamry2.2LL4N/A
2000ToyotaCorolla1.8LL4N/A
2000ToyotaCorollaN/A
2000ToyotaMR2 Spyder1.8LL4N/A
2000ToyotaMR2 SpyderN/A
2000ToyotaSolara2.2LL4N/A
2000ToyotaSolara3.0LV6N/A
2000ToyotaSolaraN/A
2000ToyotaTacoma3.4LV6N/A
2000ToyotaTacoma2.4LL4N/A
2000ToyotaTacoma2.7LL4N/A
2000ToyotaTundra3.4LV6N/A
2000ToyotaTundra4.7LV8N/A
1999LexusLS400N/A4 Term.
1999ToyotaAvalon3.0LV6N/A
1999ToyotaCamry2.2LL4N/A
1999ToyotaCamry3.0LV6N/A
1999ToyotaCorolla1.8LL4N/A
1999ToyotaSolara3.0LV6N/A
1999ToyotaSolara2.2LL4N/A
1999ToyotaTacoma2.4LL4N/A
1999ToyotaTacoma2.7LL4N/A
1999ToyotaTacoma3.4LV6N/A
1999ToyotaTercel1.5LL4N/A
1998LexusLS400N/A4 Term.
1998ToyotaAvalon3.0LV6N/A
1998ToyotaCamry2.2LL4N/A
1998ToyotaCamry3.0LV6N/A
1998ToyotaCorolla1.8LL4N/A
1998ToyotaT1003.4LV6N/A
1998ToyotaT1002.7LL4N/A
1998ToyotaT100N/A
1998ToyotaTacoma3.4LV6N/A
1998ToyotaTacoma2.4LL4N/A
1998ToyotaTacoma2.7LL4N/A
1998ToyotaTercel1.5LL4N/A
1997ToyotaCamry3.0LV6N/A
1997ToyotaCamry2.2LL4N/A
1997ToyotaCorolla1.8LL4N/A
1997ToyotaCorolla1.6LL4N/A
1997ToyotaPaseo1.5LL4N/A
1997ToyotaPrevia2.4LL4N/A
1997ToyotaRAV42.0LL4N/A
1997ToyotaT1002.7LL4N/A
1997ToyotaT1003.4LV6N/A
1997ToyotaT100N/A
1997ToyotaTacoma3.4LV6N/A
1997ToyotaTacoma2.7LL4N/A
1997ToyotaTacoma2.4LL4N/A
1997ToyotaTercel1.5LL4N/A
1996Toyota4RunnerN/A
1996ToyotaCamry3.0LV6N/A
1996ToyotaCamry2.2LL4N/A
1996ToyotaCorolla1.8LL4N/A
1996ToyotaCorolla1.6LL4N/A
1996ToyotaPaseo1.5LL4N/A
1996ToyotaPrevia2.4LL4N/A
1996ToyotaRAV42.0LL4N/A
1996ToyotaT1003.4LV6N/A
1996ToyotaT1002.7LL4N/A
1996ToyotaTacoma3.4LV6N/A
1996ToyotaTacoma2.7LL4N/A
1996ToyotaTacoma2.4LL4N/A
1996ToyotaTercel1.5LL4N/A
1995LexusES300N/A
1995Toyota4RunnerN/A
1995ToyotaCamry2.2LL4N/A
1995ToyotaCamry3.0LV6N/A
1995ToyotaCorolla1.8LL4N/A
1995ToyotaCorolla1.6LL4N/A
1995ToyotaPaseo1.5LL4N/A
1995ToyotaPrevia2.4LL4N/A
1995ToyotaT1002.7LL4N/A
1995ToyotaT1003.4LV6N/A
1995ToyotaTercel1.5LL4N/A
1994LexusES300N/A
1994LexusLS400N/A
1994Toyota4RunnerN/A
1994ToyotaCamry2.2LL4N/A
1994ToyotaCamry3.0LV6N/A
1994ToyotaCorolla1.8LL4N/A
1994ToyotaCorolla1.6LL4N/A
1994ToyotaPaseo1.5LL4N/A
1994ToyotaPrevia2.4LL4N/A
1994ToyotaT1003.0LV6N/A
1994ToyotaT1002.7LL4N/A
1994ToyotaTercel1.5LL4N/A
1993LexusES300N/A
1993LexusLS400N/A
1993Toyota4RunnerN/A
1993ToyotaCamry2.2LL4N/A
1993ToyotaCamry3.0LV6N/A
1993ToyotaCorolla1.6LL4N/A
1993ToyotaCorolla1.8LL4N/A
1993ToyotaPaseo1.5LL4N/A
1993ToyotaPrevia2.4LL4N/A
1993ToyotaT1003.0LV6N/A
1993ToyotaTercel1.5LL4N/A
1992LexusES300N/A
1992LexusLS400N/A
1992Toyota4RunnerN/A
1992ToyotaCamry3.0LV6N/A
1992ToyotaCamry2.2LL4N/A
1992ToyotaCorolla1.6LL4N/A
1992ToyotaCressida3.0LL6N/A
1992ToyotaPaseo1.5LL4N/A
1992ToyotaPrevia2.4LL4N/A
1992ToyotaTercel1.5LL4N/A
1991LexusES250N/A
1991LexusLS400N/A
1991Toyota4RunnerN/A
1991ToyotaCamry2.0LL4N/A
1991ToyotaCamry2.5LV6N/A
1991ToyotaCorolla1.6LL4N/A
1991ToyotaCressida3.0LL6N/A
1991ToyotaPrevia2.4LL4N/A
1991ToyotaTercel1.5LL4N/A
1990LexusES250N/A
1990LexusLS400N/A
1990Toyota4RunnerN/A
1990ToyotaCamry2.0LL4N/A
1990ToyotaCamry2.5LV6N/A
1990ToyotaCorolla1.6LL4N/A
1990ToyotaCressida3.0LL6N/A
1990ToyotaTercel1.5LL4N/A
1989ToyotaCamry2.5LV6N/A
1989ToyotaCamry2.0LL4N/A
1989ToyotaCelica2.0LL4N/A
1989ToyotaCorolla1.6LL4N/A
1989ToyotaCressida3.0LL6N/A
1989ToyotaTercel1.5LL4N/A
1988ToyotaCamry2.5LV6N/A
1988ToyotaCamry2.0LL4N/A
1988ToyotaCelica2.0LL4N/A
1988ToyotaCressida2.8LL6N/A
1988ToyotaTercel1.5LL4N/A
1987ToyotaCamry2.0LL4N/A
1987ToyotaCelica2.0LL4N/A
1987ToyotaCressida2.8LL6N/A
1987ToyotaTercel1.5LL4N/A
1985ToyotaCelicaGTN/A
1985ToyotaCelicaGTSN/A
1985ToyotaCelicaSTN/A

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

1R2263203-02242087125-03053618756-25208592614020AR6096R6096RAA1866

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.