I have a Pocket Wizard TT1 and TT5 which work fine. I mount the TT1 on the camera shoe and the TT5 fires my remote flash ETTL fine.
I now want a focus assist light, so I set a flash (580, 430 or ST-E2) on the TT1 but there is no focus assist light. If I put the flash directly on the shoe of the camera I get focus assist.
I measured the 5 leads on the shoe of the camera:
1 2 3 4 5
1 - is the main lead, it is at 0 when autofocusing
2, 3, and 5 show up with a volt meter; 4 stays 0 when autofocusing.
Measuring the top of the TT1 none show any activity during autofocus. I tried this on another TT1 and both had the same issue. Has no one run into this? It's driving me crazy.