Standard Ignition EFL-4 Engine Water Pump Relay

Engine Water Pump Relay for Ford and Lincoln

Standard Ignition EFL-4 is a 12-volt relay built with a 5-blade male terminal layout and male connector gender for direct electrical replacement in supported Ford, Lincoln, Mercury, Dodge, Jeep, Mazda, Pontiac, Chevrolet, and Chrysler applications. It is manufactured under strict quality controls to help maintain consistent fit and function across a wide range of vehicle platforms.

Key Features

• Part number: EFL-4
• 12-volt relay with 5 male blade terminals
• Male connector and male terminal design
• Function: flasher
• No mounting bracket included
• Built to stringent quality requirements in TS16949- and ISO9001-certified facilities

Detailed Description

Standard Ignition EFL-4 is an OE-style electrical relay used in a broad range of applications, including Ford Expedition, Ford Mustang, Ford F-150, Ford Explorer, Lincoln Navigator, and Mercury Grand Marquis platforms. This relay is also cross-referenced to Hygrade Tuneup FL11 for the same application. Standard Ignition maintains quality control from component selection through final assembly, helping ensure the relay meets the electrical and terminal-format requirements of the vehicle it serves.

For shoppers searching for an engine water pump relay, flasher relay, or 5-terminal blade relay for Ford and Lincoln vehicles, EFL-4 provides a direct-match option for many late-1990s through 2013 applications. The part number EFL-4 is commonly searched alongside Ford Mustang relay replacement and Ford F-150 relay replacement terms, making it easier to identify the correct electrical component for the vehicle.

What This Relay Helps Address

• Intermittent or inoperative relay-controlled electrical operation
• Flasher circuit faults caused by worn relay contacts
• Incorrect terminal style or connector mismatch during replacement
• Electrical cycling issues in supported Ford, Lincoln, and Mercury models
• Replacement needs for aging factory relay units

Installation Notes and Tips

Verify the terminal count, connector gender, and blade-style layout before installation. Confirm the vehicle’s original relay configuration and compare the existing part number or connector shape to EFL-4. Fitment includes many applications such as 1997-2013 Ford Expedition, 2005-2013 Ford Mustang, 1998-2013 Lincoln Navigator, and 1997-2010 Mercury Mountaineer; some listings note fitment without skirt or with 5-terminal configurations, so matching the original relay style is important.

• Fits 1997-2013 Ford Expedition
• Fits 2005-2013 Ford Mustang, fits without skirt
• Fits 1998-2013 Lincoln Navigator
• Fits 1997-2010 Mercury Mountaineer, fits without skirt
• Fits 1997-2010 Ford F-150
• Fits 1995-2010 Ford Explorer, fits without skirt

Quality Assurance

Standard Ignition manufactures this relay under TS16949 and ISO9001 certified quality systems, with control maintained throughout the production process from componentry to finished product. That process supports consistent electrical performance and repeatable fitment for supported vehicles. Part number EFL-4 is also referenced as Hygrade Tuneup FL11.