First step is to read the fine manual. Some systems the engine must be running for the system to work, some want the engine off, The parking brake must be set and the transmission in park on many systems.
Beyond that you really need the owner's manual and the service manual on your hard drive, Find out what system you have and either go to the manufacturer's web page or post and folks here will provide a link as they did for me.
There are many things that can go wrong, Though "NO OPERATION" is one of the easiest to diagnose hands on.. It can be a real pain "Long distance"
The next thing you need to know is where they hid the dang thing.
NO CLICKS, suggests blown fuse or bad control system but,, the key word is "Suggests" ton of other possible answers as well.
Home is where I park it!