Peter, thanks again . . . saw you helped with my '84 300D Turbo also.
My '87 300TD will require more investigation tomorrow. I fully charged the Interstate battery and then put a load tester on it. 500 amp load and it still remained in the green. For the time being, the battery seems to be okay though I will change it prior to the real cold weather.
As I mentioned, the Ice Cube relay for the electric seats remains quite warm to the touch. To me, that indicates there is an electrical draw that is abnormal. That is where I am going to have to start chasing. If I leave the car w/o starting it for 2-3 days it won't start. Right now, it won't start even with the battery charged plus the electric booster (charger) on it. Needed more time today since I did two oil & filter changes, fuel filter change, plugs on one of the Toyota XLEs, tightened an alternator, baked a scratch birthday cake for one of my sons, shopped, oh sh_t don't I wish I could have just kept working on my vehicles.