I've searched the previous threads about hardwiring radar detectors, and which power sources to use. From what i read Red was constant 12V, Purple + White is switched 12V and Brown is used for ground when doing switched. I have everything connected to the purple + white (+) and brown (-) and the radar is always on no matter what. I've taken a volt meter and checked the voltages ON or OFF (the car), the voltages are the same everywhere with respect to that ground. <p>Am I doing something wrong?