Troubleshooting the Fenix TK16 

The second method solved it for me - thanks!

The inside of my switch is different from the one in the video… there’s no ring to turn. 😩 I’ve resorted to using a paper clip to complete the circuit. I’m fortunate the light was on the brightest setting when I dropped it.

Inside the tailcap there is a ring on the edge that you use the knife to move clockwise. Its hard to see in this video, but its there and the thin knife edge can fit in the thin opening and reach the inside ring. Turn it clockwise to tighten it, worked for me!

First method fixed my issue! Thank you for saving me $30 on a new tail cap!

Thank you it worked like a charm!!!!

Fixed my problem right away, thanks

It is the outermost & lower silver disc beneath the brass one that you need to turn clockwise. That fixed mine!!

no sound?? cant sew what the heck you did there??