Standard Ignition RY-1743 Accessory Power Relay

Accessory Power Relay for OE-Style Electrical Control

Standard Ignition RY-1743 is a direct-fit accessory power relay built to restore proper open and close operation in vehicle electrical circuits. It uses a 12-volt, 20-amp design with 4 male blade terminals and quick-connect plug-in terminals for straightforward replacement in service applications.

Compatible With Ford Transit Connect, Ford Fiesta, Ford C-Max, Cadillac ATS, Cadillac CTS, and other listed applications, this relay is built for vehicles that need reliable switching under engine-bay heat and vibration. The Standard Ignition RY-1743 is a practical OE-style replacement for diagnosing or correcting accessory power relay faults.

Key Features

• Direct-fit accessory power relay for electrical circuit switching
• 12V relay with 20 amp amperage rating
• 4-terminal layout with male blade terminals
• Quick-connect, plug-in terminal design
• High-temperature housing for harsh underhood conditions
• Durable electro-magnet construction
• Cross-reference part numbers include Bosch 16227 and 1R3391

Detailed Description

Standard Ignition RY-1743 is engineered as a replacement accessory power relay that helps restore proper current flow across contact points when the original relay no longer opens and closes correctly. Its rectangular relay design, 4-pin configuration, and plug-in blade terminals support service-friendly installation in a wide range of Ford, Cadillac, Buick, Chevrolet, and Hyundai applications. This part number is commonly searched as RY-1743 for relay replacement needs on vehicles such as Ford Transit Connect and Ford Fiesta.

Built with durable electro-magnets and a high-temperature housing, this relay is suited to the electrical demands and heat exposure found in modern engine compartments. If you are replacing a failed accessory power relay on a Ford C-Max, Cadillac CTS, or Hyundai Elantra, RY-1743 provides an OE-style solution that matches the required electrical and connector layout.

What It Helps Fix

• Intermittent accessory power operation
• No-start or no-power conditions caused by relay failure
• Electrical circuits that do not switch on or off correctly
• Heat-related relay breakdown in the underhood fuse and relay area
• Faults traced to worn relay contacts or weak internal switching

Installation Notes and Tips

Verify the relay cavity, terminal count, connector shape, and amperage rating before installation. This part uses male blade terminals and a 4-pin plug-in connection, so it should be matched to the original relay style in the vehicle. Confirm the application by year, make, and model before replacing the relay, especially on Ford Transit Connect, Ford Fiesta, and Ford Escape listings where notes may specify a rectangular relay or 20-amp requirement.

For best results, inspect the relay socket for heat damage, corrosion, or loose terminals before installing the new relay. If the original relay showed signs of overheating, check the surrounding circuit and fuse protection as part of the repair.

Quality Assurance

Standard Ignition builds this relay with durable materials and a high-temperature housing to meet the demands of professional service use. The design follows a direct-fit replacement approach for consistent electrical switching performance in the listed applications.