Left rear brake drum gets hot

how tight is the emergency brake cable adjusted? are the individual cables, which go to each backing plate TOTALLY 100% free? they need to be FREE to apply when asked for and release completely when e-brake lever is released.
Maybe disconnect the e-brake cable from each rear shoe lever at each backing plate, and try driving it to see if it locks up or overheats again.
That was my problem. The cable had just a slight amount of tension, and apparently that was just enough to push on the shoes and cause them to grab. I loosened that nut at the equalizer bar to the point where it sags down, and it made a huge difference. I thought as long as the shoes were resting against the pin on the backing plate it was all good. But today, I learned that wasn’t the case. The drums read 74 degrees and 87 degrees. You can actually touch them without burning your hand.