DEI EL Scanner Tested and confirmed to light up. The EL emits a blue flashing light, making it very noticeable. This scanner is for installation in security systems such as Viper and Clifford. It can also be installed in security systems from other manufacturers, but please research compatibility yourself. How about using it for theft prevention? You can connect it to your security system, or you can use dummy wiring. It lights up simply by connecting the positive and negative terminals. It is also possible to make it light up when the engine is off. There are no instructions included. Shipping is included.