Yes, so everything I'm reading is load resistance, which is why I bought the load resistance flasher. Now I have 2, still not working. My understanding is that I didn't need resisters at the lights. I did read on a YouTube video of converting an 80s chevy truck with both LED and standard bulbs to a Linova552, which seemed to work. The comment section, however, showed others tried with no success. One comment back was to use a load resistance flasher with a ground to solve the issue of having all LED's bulbs.

I'll look into the resisters for the bulbs, but was hoping to avoid that and not cut or add new wires to my nice originals.