Whatever you do, don't just cut the plug off the lighter adapter. The roadys run on 6v not 12v. You can get a female lighter socket from Radio Shack, hardwire that in, and then plug your lighter plug into that. Delphi makes a kit for hardwiring them that includes the female socket and an fm adapter to actually connect the roday to your Rav's antenna for better reception. Or, you can take apart the lighter adapter, solder wires directly to the board, and use those to hardwire into vehicle (I wouldn't recommend unless you're familiar with soldering on circuit boards). I've used all three methods, and they all work well.[/b]