Standard Ignition RY-503 Fuel Pump Relay

Fuel Pump Relay for Volvo Applications

Standard Ignition RY-503 is a 12-volt fuel pump relay built for direct replacement use in select Volvo fuel delivery systems. It uses a 4-blade male terminal layout with a single female connector and a 15-amp rating for relay-controlled circuit operation.

Compatible with Volvo S40, V70, V40, S70, and 850 applications, this relay supports consistent fuel pump circuit switching in vehicles that rely on a standard relay interface. The Standard Ignition RY-503 is a practical replacement when diagnosing intermittent fuel delivery or relay-related electrical faults.

Key Features

• Fuel pump relay for air and fuel delivery systems
• 12 V electrical rating with 15 A amperage capacity
• 4 male blade terminals for relay connection
• Single female connector with square connector shape
• Continuous duty: No
• Mounting bracket included: No
• Contents: relay

Detailed Product Overview

The Standard Ignition RY-503 is engineered as a replacement fuel pump relay for Volvo models across multiple years, including 1993-1997 Volvo 850, 1998-1999 Volvo S70, 1998-2007 Volvo V70, 2000-2004 Volvo V40, and 2000-2007 Volvo S40. It is designed around a common 12-volt relay format with blade terminals, making it suitable for vehicles that use a square, single-connector relay configuration. This part cross-references Gates 20523 for the same application.

Common Issues This Relay Can Address

• Fuel pump not receiving power
• Intermittent engine start caused by relay contact failure
• Fuel delivery interruption from worn electrical switching components
• No-start condition related to relay circuit malfunction
• Erratic fuel pump operation in relay-controlled systems

Installation Notes and Tips

Verify connector shape, terminal count, and amperage rating before installation. Match the relay to the vehicle’s original fuel pump relay configuration and inspect the surrounding fuse and relay panel for heat damage, corrosion, or loose terminals. Confirm fitment for the specific Volvo model and year before replacement.

Quality Assurance

Standard Ignition supplies replacement electrical components for automotive service applications, and the RY-503 is built to meet the specified relay format and electrical requirements for the listed Volvo fitments.