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Message: [QUOTE="DP-Tuner, post: 244006, member: 1753"] Unlike most rotary knob style switchers our EX and Gauge style switcher is equipped with a microprocessor. A rotary knob style switch is designed for a pin to be grounded in order for the chip to determine what position to be in. The EX and Gauge style switcher from Moates.net design is an intelligent microprocessor that receives it power source and ground from the PCM. This allows for the seamless switching on the EX and Gauge style switcher. This is something the rotary knob cannot do. It is programmed to monitor button activity to determine which program the chip needs to be in. When its power source is interrupted it shut down. This is because of a a drop in its power source below 12volts. To help with the power draw you must hook in to the passenger side battery for your HID lights power source and make sure the HID lights are grounded with a ground wire or you may need to install additional grounds. Ferrite beads are in place on the Moates.net chips and switchers, but they may not be enough to protect against the amount of RF interference given off by aftermarket HID lights. Not all HID lights are made the same, if you experience a shut -down situation with the brand of HID lights you have installed you must add 2 small chokes of ferrite to each end of the Ex and Gauge style switcher cable. In most cases this has fixed the issue our chip has with HID lights. Disclaimer: The use of HID lights on Highway roads are illegal to use on various US state roads. If you chose to run Aftermarket HID lights please check with your local government for legal use in your State or Region. DP-Tuner shall not be held responsible to any personal injury or property damage of any nature due to a malfunction of your HID lights. DP-Tuner [/QUOTE]