This retained accessory power system allows selected accessories—such as radios, power windows, or other interior electronics—to remain powered after the ignition is turned off. Power is maintained until the system is deactivated by a grounding signal, typically triggered when the driver’s door is opened. It’s a clean, factory-style solution for adding modern convenience to custom builds and restorations.

• Keeps selected accessory circuits powered with ignition off
• Ideal for radios, power windows, and interior accessories
• Power shuts off when a grounding relay is activated
• Commonly triggered by a normally-open driver’s door switch
• Provides factory-style retained accessory power functionality
• Designed for clean, reliable integration into custom wiring systems