Here’s Launch EasyDiag mux connection instruction. Hope this helps.
1. Remove connector once testing and/or diagnosis is complete;
2. Maybe it is difficult to plug or unplug connector in some vehicles because of the varied position of the DLC, but auxiliary connector can help you to avoid this problems.
3. Please turn off the ignition switch before connecting and then turn the key to the ON position after the EasyDiag has been plugged in.
Steps to connect:
Step 1: Locate the vehicle’s DLC socket. It is usually located under the dashboard, towards the driver’s left knee area.
Step 2: Plug the EasyDiag connector into DLC socket. The connector’s power indicator will light up to signify communication and you will hear an audible beep.