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Standard Ignition RY-90 Headlight Dimmer Switch RelayOE Quality 60-Day Returns
Part #: RY-90

Standard Ignition RY-90 Headlight Dimmer Switch Relay

191 vehicles fit this part
Select your vehicle to confirm fitment
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Fitment: Mercury, Nissan, INFINITI, and Subaru, Villager, 200SX, 240SX, Altima, Maxima, Pathfinder, Pickup, Quest, Sentra, G20, 300ZX, Axxess, D21, Q45, NX, M30, Stanza, Loyale, Micra, Pulsar NX, Multi, Van, 720, 280ZX, Pulsar, 210, 310, 510, 810, 620, 280Z, B210, F10, 710, 610, and 260Z
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Not what you need? See all Headlight Dimmer Switch Relay options

Reliable Headlight Dimmer Switch Relay for Infiniti, Nissan, Mercury

The Standard Ignition RY-90 headlight dimmer switch relay is designed to restore proper headlight function in select Infiniti, Nissan, and Mercury vehicles. This relay ensures consistent electrical performance for your vehicle's lighting system, helping maintain safe and reliable operation.

Key Features of Standard Ignition RY-90 Relay

  • Compatible with multiple Infiniti, Nissan, and Mercury models including 200SX, 240SX, 300ZX, Altima, Maxima, Pathfinder, and more
  • Direct replacement for factory headlight dimmer switch relays
  • Durable construction for long-lasting electrical performance
  • Ensures proper switching between high and low beam headlights
  • Part number RY-90 for easy identification and fitment

Product Details and Compatibility

The Standard Ignition RY-90 headlight dimmer switch relay is engineered to meet OEM specifications for electrical relays controlling headlight dimming functions. It is compatible with a range of Nissan models such as the 200SX, 240SX, 300ZX, Altima, Maxima, Pathfinder, Pulsar, Sentra, and Quest. Additionally, it fits Infiniti models including the G20, M30, NX, and Q45, as well as Mercury vehicles like the Villager and Cougar. This relay replaces the original component responsible for switching between high and low beam headlights, ensuring your vehicle's lighting system operates correctly.

Common Applications and Issues Addressed

  • Restores headlight dimming function when headlights fail to switch between high and low beams
  • Resolves intermittent or non-functioning headlight dimmer switch problems
  • Eliminates flickering or inconsistent headlight operation related to relay failure
  • Prevents electrical shorts or relay-related headlight malfunctions
  • Supports proper lighting control in vehicles with aging or worn relays

Installation Notes and Tips

  • Ensure vehicle ignition is off before replacing the relay to avoid electrical shock
  • Locate the headlight dimmer switch relay in the fuse box or relay panel as specified in the vehicle’s service manual
  • Compare the new RY-90 relay with the original to confirm correct part number and pin configuration
  • Securely seat the relay in the socket to maintain proper electrical contact
  • Test headlight operation after installation to verify correct function

Quality Assurance and Warranty

Standard Ignition manufactures the RY-90 relay to meet or exceed OEM standards for electrical components. Each relay undergoes quality control testing to ensure reliable performance and durability. While specific warranty terms may vary, Standard Ignition typically offers a limited warranty against defects in materials and workmanship. Refer to the product packaging or manufacturer documentation for detailed warranty information.

BrandStandard Ignition
Part NumberRY-90
Amperage Rating10
Connector GenderFemale
Connector ShapeRectangular
FunctionsRelay
Mounting Bracket(s) IncludedNo
Terminal GenderMale
Terminal TypeBlade
Voltage12

This part fits 191 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2002MercuryVillagerN/A5-blade terminal for automatic transmission spark control relay.
1997Nissan200SXN/AOE No. 25230-C9961, 71; 5 Term.
1997Nissan240SXN/AOE No. 25230-C9961, 71; 5 Term.
1997NissanAltimaN/AOE No. 25230-C9961, 71; 5 Term.
1997NissanAltimaN/A
1997NissanMaximaN/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1997NissanPathfinderN/AOE No. 25230-C9961, 71; 5 Term.
1997NissanPickupN/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1997NissanQuestN/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1997NissanSentraN/Aw/ Skirt; Square Relay; Black; 5 Term.
1996INFINITIG20N/A
1996Nissan200SXN/AOE No. 25230-C9961, 71; 5 Term.
1996Nissan240SXN/AOE No. 25230-C9961, 71; 5 Term.
1996Nissan300ZXN/AOE No. 25230-C9961, 71; 5 Term.
1996NissanAltimaN/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1996NissanAltimaN/A
1996NissanMaximaN/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1996NissanPathfinderN/AOE No. 25230-C9961, 71; 5 Term.
1996NissanPickupN/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1996NissanQuestN/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1996NissanSentraN/Aw/ Skirt; Square Relay; Black; 5 Term.
1995INFINITIG20N/A
1995Nissan200SXN/AOE No. 25230-C9961, 71; 5 Term.
1995Nissan240SXN/AOE No. 25230-C9961, 71; 5 Term.
1995Nissan300ZXN/AOE No. 25230-C9961, 71; 5 Term.
1995Nissan300ZXN/A
1995Nissan300ZXN/AFits: Door Window Switch- Black
1995NissanAltimaN/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1995NissanAltimaN/A
1995NissanAltimaN/A5 Term ABS Relay
1995NissanMaximaN/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1995NissanPathfinderN/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1995NissanPathfinderN/AFits: Door Window Switch- Black
1995NissanPickupN/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1995NissanQuestN/A
1995NissanSentraN/Aw/ Skirt; Square Relay; Black; 5 Term.
1994INFINITIG20N/A5-blade terminal for automatic transmission spark control relay.
1994INFINITIG20N/A
1994Nissan240SXN/A
1994Nissan300ZXN/A
1994Nissan300ZXN/AFits: Door Window Switch- Black
1994NissanAltimaN/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1994NissanAltimaN/A
1994NissanAltimaN/A5 Term ABS Relay
1994NissanD21N/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1994NissanMaximaN/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1994NissanPathfinderN/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1994NissanQuestN/A
1994NissanSentraN/Aw/ Skirt; Square Relay; Black; 5 Term.
1993INFINITIG20N/A
1993INFINITIG20N/A5-blade terminal for automatic transmission spark control relay.
1993INFINITIQ45N/A5-blade terminal for automatic transmission spark control relay.
1993Nissan240SXN/A
1993Nissan300ZXN/A
1993NissanAltimaN/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1993NissanAltimaN/A
1993NissanAltimaN/A5 Term ABS Relay
1993NissanD21N/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1993NissanMaximaN/A
1993NissanNXN/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1993NissanPathfinderN/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1993NissanQuestN/A
1993NissanSentraN/Aw/ Skirt; Square Relay; Black; 5 Term.
1992INFINITIG20N/A
1992INFINITIM30N/A
1992INFINITIQ45N/A
1992Nissan240SXN/A
1992Nissan300ZXN/A
1992NissanD21N/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1992NissanMaximaN/A
1992NissanNXN/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1992NissanPathfinderN/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1992NissanPathfinderN/AFits: Door Window Switch- Black
1992NissanSentraN/Aw/ Skirt; Square Relay; Black; 5 Term.
1991INFINITIG20N/A
1991INFINITIM30N/A
1991INFINITIQ45N/A
1991Nissan240SXN/A
1991Nissan300ZXN/A
1991NissanD21N/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1991NissanMaximaN/A
1991NissanNXN/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1991NissanPathfinderN/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1991NissanPathfinderN/AFits: Door Window Switch- Black
1991NissanSentraN/Aw/ Skirt; Square Relay; Black; 5 Term.
1990INFINITIM30N/A
1990INFINITIQ45N/A
1990Nissan240SXN/A
1990Nissan300ZXN/A5-blade terminal for automatic transmission spark control relay.
1990Nissan300ZXN/A
1990NissanD21N/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1990NissanMaximaN/A
1990NissanPathfinderN/A
1990NissanPulsar NXN/A
1990NissanPulsar NXN/A5-blade terminal for automatic transmission spark control relay.
1990NissanSentraN/Aw/ Skirt; Square Relay; Black; 5 Term.
1989Nissan240SXN/A
1989Nissan300ZXN/A
1989Nissan300ZXN/A5-blade terminal for automatic transmission spark control relay.
1989NissanD21N/AReuse Rubber Shield; OE No. 25230-04G00, 05; Black and White; 5 Blade Term.
1989NissanMaximaN/A
1989NissanPathfinderN/AReuse Rubber Shield; OE No. 25230-04G00, 05; Black and White; 5 Blade Term.
1989NissanPulsar NXN/A5-blade terminal for automatic transmission spark control relay.
1989NissanPulsar NXN/A
1989NissanSentraN/Aw/ Skirt; Square Relay; Black; 5 Term.
1988Nissan200SXN/A
1988Nissan300ZXN/A5-blade terminal for automatic transmission spark control relay.
1988Nissan300ZXN/A
1988NissanD21N/AReuse Rubber Shield; OE No. 25230-04G00, 05; Black and White; 5 Blade Term.
1988NissanMaximaN/A
1988NissanPathfinderN/AReuse Rubber Shield; OE No. 25230-04G00, 05; Black and White; 5 Blade Term.
1988NissanPulsar NXN/A5-blade terminal for automatic transmission spark control relay.
1988NissanPulsar NXN/A
1988NissanSentraN/Aw/ Skirt; Square Relay; Black; 5 Term.
1987Nissan200SXN/A
1987Nissan300ZXN/A5-blade terminal for automatic transmission spark control relay.
1987Nissan300ZXN/A
1987NissanD21N/AReuse Rubber Shield; OE No. 25230-04G00, 05; Black and White; 5 Blade Term.
1987NissanMaximaN/A
1987NissanPathfinderN/A
1987NissanPulsar NXN/A5-blade terminal for automatic transmission spark control relay.
1987NissanPulsar NXN/A
1987NissanSentraN/Aw/ Skirt; Square Relay; Black; 5 Term.
1986Nissan200SXN/A
1986Nissan300ZXN/A
1986Nissan300ZXN/A5-blade terminal for automatic transmission spark control relay.
1986Nissan720N/AReuse Rubber Shield; OE No. 25230-04G00, 05; Black and White; 5 Blade Term.
1986NissanD21N/AReuse Rubber Shield; OE No. 25230-04G00, 05; Black and White; 5 Blade Term.
1986NissanMaximaN/A
1986NissanPulsar NXN/AReuse Rubber Shield; OE No. 25230-04G00, 05; Black and White; 5 Blade Term.
1986NissanSentraN/Aw/ Skirt; Square Relay; Black; 5 Term.
1985Nissan200SXN/A
1985Nissan300ZXN/A5-blade terminal for automatic transmission spark control relay.
1985Nissan300ZXN/A
1985Nissan7202.0LL4N/AOE No. 25230-C9961, C9971
1985Nissan7202.4LL4N/AOE No. 25230-C9961, C9971
1985Nissan7202.5LL4N/AOE No. 25230-C9961, C9971
1985NissanMaximaN/A
1985NissanPulsar NX1.6LL4N/AOE No. 25230-C9961, C9971
1985NissanSentra1.6LL4N/AOE No. 25230-C9961, C9971
1985NissanSentra1.7LL4N/AOE No. 25230-C9961, C9971
1984Nissan200SXN/A
1984Nissan300ZXN/A5-blade terminal for automatic transmission spark control relay.
1984Nissan300ZXN/A
1984Nissan7202.4LL4N/AOE No. 25230-C9961, C9971
1984Nissan7202.5LL4N/AOE No. 25230-C9961, C9971
1984Nissan7202.0LL4N/AOE No. 25230-C9961, C9971
1984NissanMaximaN/A
1984NissanPulsar NX1.5LL4N/AOE No. 25230-C9961, C9971
1984NissanPulsar NX1.6LL4N/AOE No. 25230-C9961, C9971
1984NissanSentra1.7LL4N/AOE No. 25230-C9961, C9971
1984NissanSentra1.6LL4N/AOE No. 25230-C9961, C9971
1983Nissan200SXN/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1983Nissan280ZXN/Aw/ Skirt; 5 Term.
1983Nissan720N/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1983NissanMaximaN/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1983NissanPulsarN/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1983NissanPulsar NXN/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1983NissanSentraN/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1982Nissan200SXN/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1982Nissan210N/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1982Nissan280ZXN/A5 Term ABS Relay
1982Nissan310N/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1982Nissan720N/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1982NissanMaximaN/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1982NissanSentraN/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1981Nissan200SXN/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1981Nissan210N/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1981Nissan280ZXN/Aw/ Skirt; 5 Term.
1981Nissan310N/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1981Nissan510N/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1981Nissan720N/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1981Nissan810N/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1980Nissan200SXN/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1980Nissan210N/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1980Nissan280ZXN/Aw/ Skirt; 5 Term.
1980Nissan310N/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1980Nissan510N/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1980Nissan720N/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1980Nissan810N/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1979Nissan200SXN/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1979Nissan210N/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1979Nissan280ZXN/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1979Nissan310N/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1979Nissan510N/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1979Nissan810N/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1978Nissan200SXN/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1978Nissan510N/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1978Nissan810N/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1977Nissan200SXN/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.
1977Nissan810N/AOE No. 25230-C9961, 71; Black and White; 5 Blade Term.

* 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:

199301R1312203-010925-01302523004G003F5Z14N089AA56-177278805307088922603AR352AR366R3065RAA1318

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