Hi just got a 2014 mazda6 GT and finally figure out how to disable the safety lock on the navi so u can use the keyboard while driving. This is for a 2014 mazda6 GT. Other model may be different. Remove radio head unit. Look for vio/red (violet with red stripe) wire. It will be on the largest connector near the middle of the connector. ***important only cut the wire DO NOT GROUND. Tape both end of wire so it doesn't short out. To verified it's the right wire is to unplug radio and measure DC voltage on Vio/red wire. It'll read battery volts when car is not moving and lower voltage when car is moving. If using labscope it will be square waveform when moving. So far I haven't notice any cons in doing this.