What PocketWizard do you have ? What firmware level ?
Make sure both ends of the cord are fully plugged in.
There is some software to download that allows you to check firmware level and upgrade if necessary.
You don't need to turn on remote control.
My PocketWizard III has Beta firmware 1.212 and works with my a9.
I want to trigger my A7iii with a Pocketwizard. I bought what I believe was the right cable, plugged it into the camera and the PW. When I test fire the unit, I see the PW attached to the cameras red light blinks every time I test fire the unit but it does not trigger the camera. In the cameras 6000 pages of menus, I have turned "remote control" to the on position, but still no photos. Open to all suggestions.
At least on paper its going to be OK. The 0.31x reproduction ratio is probably good enough. The Sony macro lens has reproduction ration 1.0x (3 times larger), but for many not too small things, 0.31x would do the trick.
I use a Zeiss Milvus 50mm macro lens, many times at 1:3 (0.33x) ratio, and I find it to be good.