Some radar detectors are more sophisticated than others.
Many models require the connection of only two wires - ground and power.
Other varieties require the connection of more wires as well as component parts. If you believe you have the skills to install a radar detector yourself, here are some simple steps to follow. Read the instructions that come with the detector. Don't do anything until you fully understand the instructions. Open the radar detector's box and make sure you have everything you are supposed to have.