Improve the performance and reliability of your 1988-1993 7.3L Ford Powerstroke with our IDI Glow Plug Relay Controller. This essential component is designed to optimize your engine's glow plug system, ensuring that your engine starts smoothly and efficiently every time. With a one year unlimited mileage warranty, you can trust that it's built to last. Don't let a faulty glow plug relay hold you back any longer. Get our IDI Glow Plug Relay Controller today and experience the difference it makes.