So I am having a debate with another member of my department over the installation of a CDM1550 into our ATV. There is a battery buried in the rear of our side by side, and an accessory power terminal under the hood, which is switched and not constant. I wired the power to there, tapped a new ground into the frame, and planned on doing the jumper mod to activate the ignition sense feature. My comrade was supposed to crimp on the antenna connection today and connect it to the radio, completing the installation. Instead, he pulled all of my nice, clean wiring apart, as well as half of the brand new ATV body panels to run wiring directly to the battery. He claims the radio must have constant 12v power. My contention is that the CDMs in our engines do not have constant 12v due to he battery disconnect switches and they work just fine. Which one of us is right? Also, when I completed the installation yesterday I tested the radio and it worked fine and seemed to have sufficient power for transmitting. Thanks for the help!