Thank you, Stan. I re-calibrated with 18 v from postwar ZW. (with about the same results).
While testing a new Rev L TIU, all 4 OUPUTS (1 at a time) Blue On and at the same time the Blu and Red fast blip once and go off. Does that mean very good signal or NO signal?
I posted test results toward the bottom of this topic, Post for Use and Interpretation of TIU Tester Results, for 4 TIUs. I didn't get any green red combination results, just red. I'm puzzled why I don't see any red green combos.