Standard Ignition RY-1781 Engine Cooling Fan Motor Relay

Engine Cooling Fan Relay for GM Applications

The Standard Ignition RY-1781 is a direct-fit engine cooling fan motor relay built to restore proper electrical switching in the cooling fan circuit. It uses a square connector shape, 4 blade terminals, and 12-volt operation for service on select Buick, Chevrolet, and related GM vehicles.

Key Features

• Direct-fit engine cooling fan motor relay
• Square connector shape with 4 male blade terminals
• 12-volt electrical design
• Quick-connect, plug-in terminal style for straightforward replacement
• High-temperature housing and durable electro-magnet construction
• Standard Ignition RY-1781 replacement part

Detailed Description

Standard Ignition RY-1781 is engineered to open and close the cooling fan circuit correctly so current can flow across the contact points when commanded. Built with heat-resistant housing and robust internal components, this relay is suited for the demands of engine-bay service. It cross-references Remy 16262 for the same application and is listed for vehicles including 2014-2016 Buick LaCrosse, 2011-2015 Buick Regal, 2014 Chevrolet Impala, 2013-2014 Chevrolet Trax, and 2010 Buick Allure. If you are replacing a cooling fan relay on a Buick LaCrosse, Buick Regal, or Chevrolet Impala, RY-1781 provides the correct electrical format and terminal layout for the listed applications.

What It Helps Fix

• Cooling fan not switching on when the engine reaches operating temperature
• Intermittent fan operation caused by relay contact wear
• Overheating concerns related to a failed fan relay
• Electrical switching faults in the engine cooling fan circuit
• Hard-to-diagnose fan control issues on GM vehicles

Installation Notes and Tips

Verify the connector shape, terminal count, and 12-volt specification before installation. This relay uses quick-connect, plug-in terminals and does not include a mounting bracket. Confirm the vehicle’s original relay configuration matches the square, 4-blade layout shown for the listed Buick and Chevrolet applications.

Quality Assurance

Standard Ignition builds this relay with durable electro-magnets and high-temperature housing materials to meet the demands of professional service work. The RY-1781 is a direct-fit replacement designed to restore proper relay function in the cooling fan circuit.