Standard Ignition RY-509 Rear Window Defroster Relay

Window Defroster Relay for Select Jeep and Chrysler Models

Standard Ignition RY-509 is a 12-volt window defroster relay built for vehicles that rely on a blade-terminal, square-connector relay layout. It is a direct-fit electrical replacement for select Chrysler PT Cruiser, Dodge Viper, and Jeep applications, including Cherokee, Grand Cherokee, Wrangler, TJ, Comanche, and Grand Wagoneer coverage.

Key Features

• 12-volt relay for window defroster circuits
• Square connector shape with 5 male blade terminals
• Relay-only contents for straightforward electrical replacement
• No mounting bracket included
• Built with composite housing for heat and underhood exposure
• Brass or copper contacts used where specified for wear resistance
• Manufactured under TS16949 and ISO9001 certified processes

Detailed Description

The Standard Ignition RY-509 window defroster relay is engineered for dependable electrical switching in defrost systems. It is a fitment-based replacement for 2007 and 2009-2010 Chrysler PT Cruiser, 1997-2002 Dodge Viper, and multiple Jeep platforms including 1991-1996 Cherokee, 1993-1997 Grand Cherokee, 1993 Grand Wagoneer, 1992 Comanche, 1993-1995 Wrangler, and 1997-1998 TJ and Wrangler. This part number, RY-509, is also cross-referenced to Davico Mfg 19368 for the same application.

Standard Ignition uses composite housings to help protect the relay from harsh temperature swings and severe underhood conditions. The relay is manufactured with controlled quality processes from component to finished product, making it a practical choice for restoring proper defroster relay operation on Jeep Wrangler, Jeep Cherokee, and Chrysler PT Cruiser electrical systems.

What It Helps Fix

• Rear window defroster not activating
• Intermittent defroster relay operation
• Electrical switching failure in the defrost circuit
• Heat-related relay housing damage
• Corrosion or wear at relay terminals

Installation Notes and Tips

Verify the connector shape, terminal count, and 12-volt specification before installation. This relay uses a square connector with 5 male blade terminals, so matching the original relay layout is important for proper fitment. Confirm the vehicle application against the listed years for Chrysler PT Cruiser, Dodge Viper, and Jeep Cherokee, Grand Cherokee, Wrangler, TJ, Comanche, and Grand Wagoneer before replacement.

Quality Assurance

Standard Ignition manufactures this relay under TS16949 and ISO9001 certified quality systems and maintains control through the production process to help ensure consistent fit and function.