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Standard Ignition RY-303 Headlight Dimmer Switch Relay
| Brand | Standard Ignition RY-303 |
|---|---|
| Amperage Rating | 30 A |
| Connector Gender | Female |
| Connector Shape | Rectangular |
| Contents | Relay |
| Continuous Duty | No |
| Functions | Relay |
| Mounting Bracket(s) Included | No |
| Terminal Gender | Male |
| Terminal Type | Blade |
| Voltage | 12 |
| Fits | Ford, Mercury, and Lincoln · 91 vehicles |
OE-quality relay. Built to stringent standards for dependable electrical performance.
Composite housing. Helps protect against harsh temperatures and severe underhood conditions.
Brass or copper contacts. Promote extended wear for longer service life.
Cross-references Davico Mfg 19353, 1R1123 and 56-1611 for the same application. See all 9.
Headlight Dimmer Switch Relay for Ford and Mercury
Standard Ignition RY-303 is a 12-volt headlight dimmer switch relay built for select Ford, Lincoln, and Mercury applications. It uses a 6-terminal blade design with a rectangular female connector and 30-amp rating for direct replacement service in vehicles with the correct OE configuration.
Key Features
- 12-volt relay with 30 A amperage rating
- 6 blade terminals with a rectangular female connector
- Relay function for headlight dimmer switch circuits
- Composite housing helps protect against harsh underhood temperatures
- Brass or copper contacts are used where specified for wear resistance
- Manufactured under TS16949 and ISO9001 quality systems
Detailed Description
Standard Ignition RY-303 is a headlight dimmer switch relay engineered for vehicles that require a 6-terminal relay in the lighting control circuit. It is listed for applications including 1992-2007 Ford Crown Victoria, 1990-2007 Mercury Grand Marquis, 1990-2005 Mercury Sable, and 2003-2004 Mercury Marauder, along with additional Ford, Lincoln, and Mercury models. This part number, RY-303, is built with a composite housing and specified metal contacts to support consistent electrical performance in demanding engine-compartment conditions.
This part cross-references Davico Mfg 19353 for the same application.
What It Helps Address
- Intermittent headlight dimmer relay operation
- Headlights that do not switch properly between high and low beam
- Electrical relay failure in the lighting control circuit
- Heat-related relay degradation under the hood
- Incorrect relay replacement on 6-terminal applications
Installation Notes and Tips
Verify the connector shape, terminal count, and voltage before installation. RY-303 uses a female rectangular connector with male blade terminals, so the replacement relay must match the vehicle’s original electrical layout. Confirm the exact year, make, and model application for Ford Crown Victoria, Mercury Grand Marquis, Mercury Sable, Lincoln Town Car, and other listed vehicles before service.
Quality Assurance
Standard Ignition manufactures this relay under stringent quality requirements with TS16949 and ISO9001 certified production systems. The brand maintains quality control from component selection through finished product assembly to support accurate OE-style replacement fitment.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2007 | Ford | Crown Victoria | — | — | N/A | — |
| 2007 | Mercury | Grand Marquis | — | — | N/A | — |
| 2006 | Ford | Crown Victoria | — | — | N/A | — |
| 2006 | Mercury | Grand Marquis | — | — | N/A | — |
| 2005 | Ford | Crown Victoria | — | — | N/A | — |
| 2005 | Mercury | Grand Marquis | — | — | N/A | — |
| 2005 | Mercury | Sable | — | — | N/A | — |
| 2004 | Ford | Crown Victoria | — | — | N/A | — |
| 2004 | Mercury | Grand Marquis | — | — | N/A | — |
| 2004 | Mercury | Marauder | — | — | N/A | — |
| 2004 | Mercury | Sable | — | — | N/A | — |
| 2003 | Ford | Crown Victoria | — | — | N/A | — |
| 2003 | Mercury | Grand Marquis | — | — | N/A | — |
| 2003 | Mercury | Marauder | — | — | N/A | — |
| 2003 | Mercury | Sable | — | — | N/A | — |
| 2002 | Ford | Crown Victoria | — | — | N/A | — |
| 2002 | Mercury | Grand Marquis | — | — | N/A | — |
| 2002 | Mercury | Sable | — | — | N/A | — |
| 2001 | Ford | Crown Victoria | — | — | N/A | — |
| 2001 | Ford | Grand Marquis | — | — | N/A | — |
| 2001 | Mercury | Grand Marquis | — | — | N/A | — |
| 2001 | Mercury | Sable | — | — | N/A | — |
| 2000 | Ford | Crown Victoria | — | — | N/A | — |
| 2000 | Mercury | Grand Marquis | — | — | N/A | — |
| 2000 | Mercury | Sable | — | — | N/A | — |
| 1999 | Ford | Crown Victoria | — | — | N/A | — |
| 1999 | Mercury | Grand Marquis | — | — | N/A | — |
| 1999 | Mercury | Sable | — | — | N/A | — |
| 1998 | Ford | Crown Victoria | — | — | N/A | — |
| 1998 | Mercury | Grand Marquis | — | — | N/A | — |
| 1998 | Mercury | Sable | — | — | N/A | — |
| 1997 | Ford | Crown Victoria | — | — | N/A | — |
| 1997 | Ford | Crown Victoria | — | — | N/A | On-Off Delay |
| 1997 | Lincoln | Continental | — | — | N/A | — |
| 1997 | Mercury | Grand Marquis | — | — | N/A | — |
| 1997 | Mercury | Sable | — | — | N/A | — |
| 1996 | Ford | Crown Victoria | — | — | N/A | — |
| 1996 | Ford | Crown Victoria | — | — | N/A | On-Off Delay |
| 1996 | Lincoln | Continental | — | — | N/A | — |
| 1996 | Mercury | Grand Marquis | — | — | N/A | — |
| 1996 | Mercury | Sable | — | — | N/A | — |
| 1995 | Ford | Crown Victoria | — | — | N/A | — |
| 1995 | Ford | Taurus | — | — | N/A | — |
| 1995 | Lincoln | Continental | — | — | N/A | — |
| 1995 | Lincoln | Town Car | — | — | N/A | — |
| 1995 | Lincoln | Town Car | — | — | N/A | For vehicles equipped with automatic headlights |
| 1995 | Mercury | Grand Marquis | — | — | N/A | — |
| 1995 | Mercury | Sable | — | — | N/A | — |
| 1994 | Ford | Crown Victoria | — | — | N/A | — |
| 1994 | Ford | Crown Victoria | — | — | N/A | On-Off Delay |
| 1994 | Ford | Taurus | — | — | N/A | — |
| 1994 | Lincoln | Continental | — | — | N/A | — |
| 1994 | Lincoln | Town Car | — | — | N/A | — |
| 1994 | Lincoln | Town Car | — | — | N/A | For vehicles equipped with automatic headlights |
| 1994 | Mercury | Grand Marquis | — | — | N/A | — |
| 1994 | Mercury | Sable | — | — | N/A | — |
| 1993 | Ford | Crown Victoria | — | — | N/A | — |
| 1993 | Ford | Crown Victoria | — | — | N/A | On-Off Delay |
| 1993 | Ford | Taurus | — | — | N/A | — |
| 1993 | Lincoln | Continental | — | — | N/A | — |
| 1993 | Lincoln | Mark VIII | — | — | N/A | — |
| 1993 | Lincoln | Town Car | — | — | N/A | — |
| 1993 | Lincoln | Town Car | — | — | N/A | For vehicles equipped with automatic headlights |
| 1993 | Mercury | Grand Marquis | — | — | N/A | — |
| 1993 | Mercury | Sable | — | — | N/A | — |
| 1992 | Ford | Crown Victoria | — | — | N/A | — |
| 1992 | Ford | Taurus | — | — | N/A | — |
| 1992 | Lincoln | Continental | — | — | N/A | — |
| 1992 | Lincoln | Mark VII | — | — | N/A | — |
| 1992 | Lincoln | Town Car | — | — | N/A | — |
| 1992 | Lincoln | Town Car | — | — | N/A | For vehicles equipped with automatic headlights |
| 1992 | Mercury | Grand Marquis | — | — | N/A | — |
| 1992 | Mercury | Sable | — | — | N/A | — |
| 1991 | Ford | LTD Crown Victoria | — | — | N/A | — |
| 1991 | Ford | Taurus | — | — | N/A | — |
| 1991 | Lincoln | Continental | — | — | N/A | — |
| 1991 | Lincoln | Mark VII | — | — | N/A | — |
| 1991 | Lincoln | Town Car | — | — | N/A | — |
| 1991 | Lincoln | Town Car | — | — | N/A | For vehicles equipped with automatic headlights |
| 1991 | Mercury | Grand Marquis | 5.0L | V8 | N/A | For vehicles with Auto Headlight Control only. |
| 1991 | Mercury | Grand Marquis | 5.0L | V8 | N/A | — |
| 1991 | Mercury | Sable | — | — | N/A | — |
| 1990 | Ford | LTD Crown Victoria | — | — | N/A | — |
| 1990 | Ford | Taurus | — | — | N/A | — |
| 1990 | Lincoln | Continental | — | — | N/A | 6 Term. |
| 1990 | Lincoln | Mark VII | — | — | N/A | — |
| 1990 | Lincoln | Mark VII | — | — | N/A | 6 Term. |
| 1990 | Lincoln | Town Car | — | — | N/A | — |
| 1990 | Lincoln | Town Car | — | — | N/A | For vehicles equipped with automatic headlights |
| 1990 | Mercury | Grand Marquis | 5.0L | V8 | N/A | — |
| 1990 | Mercury | Sable | — | — | N/A | — |
| No rows match your filter. | ||||||