Keep your accessory circuits switching cleanly with the Standard Ignition Accessory Power Relay RY-1787, also listed as a Multi-Function Relay and written RY1787. It drops in as a direct-fit replacement for the 2004-2005 Honda Civic — see the Buyer's Guide tab for full application details. A relay uses a low-current signal to open and close a higher-current circuit, so if a failed original relay is the cause of an accessory that won't power on or cuts out intermittently, this replaces it.
- Built to last: a high-quality composite housing helps protect against harsh temperatures and demanding under-hood conditions for lasting reliability.
- Certified quality: manufactured at TS16949 and ISO9001 certified facilities to meet high industry standards.
- Enhanced wear resistance: brass or copper contacts, where specified, provide extended wear resistance for reliable switching in high-stress applications.
- Trusted source: produced by a global manufacturer of original-equipment ignition products with quality control maintained from componentry to finished part.
Interchange: R7290 · 16203 · AR7291 · 39794S1AG01
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
What does this relay do?
It uses a low-current control signal to open and close a higher-current accessory circuit, switching power to the connected component on and off.
Will this fit my vehicle?
It is a direct-fit replacement for the 2004-2005 Honda Civic. Check the Buyer's Guide tab and confirm fitment for your vehicle before ordering.
What are signs this relay may need replacing?
An accessory that won't power on, cuts out intermittently, or a relay that clicks abnormally can be signs. Diagnose the cause first, since other components can produce the same symptoms.
What numbers does this part interchange with?
It cross-references R7290, 16203, AR7291, and 39794S1AG01.
What is the housing made of?
It features a high-quality composite housing designed to protect against harsh temperatures and demanding under-hood conditions.
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