Suzuki
2002-2007 Suzuki Vinson Quadrunner 500 Troubleshooting
The Suzuki Vinson Quadrunner 4wd system utilizes an electric push button to actuate 2wd and 4wd. These machines do not have differential lock.
See this YouTube Video for detailed information on the 4wd System.
Here is a link to the service manual. See sections 8-23 through 8-26 for the 4wd System.