I put LED bulbs in my turn signals, tail/brake light too. I didn't use a load equalizer.
I used a flasher unit designed for LED bulbs, don't need no equalizer.
The only reason to use a load equalizer is to keep the self canceller working. The 75 don't have an auto canceller.
You probably have a ground hooked up wrong on the equalizer.
If it was me I'd set the equalizer on a shelf and wire the signals with out it.