I had the shop install my Super 35 and Eaton elocker and they left the plug hanging on the axle and I wired up the locker. I looked at a few videos and followed as was said. I went to test the locker as per Eaton manual. I jacked up one tire, activated the switch which lit up and I rotated the tire and it didn’t seem to lock. What are the steps to check if it is working? Do I have to be in 4L? I don’t hear any noise at the locker when it is activated. Should I hear anything? I’m going to make sure that I am getting 12v at the axle plug.