Standard Ignition S-521 Parking Light Bulb Socket - Front

Parking Light Bulb Socket for Ford and Mercury

Standard Ignition S-521 is a parking light bulb socket built for direct electrical repair work on select Ford and Mercury vehicles. It uses a female connector with three wire leads and a male terminal layout to restore a secure connection where the original socket has failed.

• Parking light bulb socket for electrical repair
• Female connector with wire-lead terminal design
• Three-wire pigtail assembly
• Built with high-grade materials for strong conductivity
• Designed to address common socket and connection failures

Fitment and Application Details

Compatible with 1974-1975 Ford Pinto, 1979 Mercury Marquis lower light applications, 1975-1979 Mercury Marquis with plastic base and 3 wires, and 1980 Mercury Cougar. Standard Ignition S-521 is a practical replacement when the original parking light bulb socket shows heat damage, corrosion, or broken terminals.

This part cross-references Dorman - Conduct-Tite 84716 for the same application.

What This Socket Helps Repair

• Intermittent parking light operation caused by worn terminals
• Corrosion at the bulb socket connection
• Heat-related damage to the original pigtail assembly
• Broken or loose wire-lead connections
• Electrical contact loss at the parking light circuit

Installation Notes and Tips

Inspect the vehicle-side wiring and connector before installation, and verify terminal alignment with the existing harness. Match the socket to the original parking light bulb application and confirm the wire-lead routing follows the factory layout for a clean repair.

Quality Assurance

Standard Ignition builds its pigtails and sockets with materials selected for conductivity and reliable connection quality. The brand’s electrical product development focuses on correcting common failure points found in original equipment sockets.