dontmachme

alright so i have a 93 es300 about 7 months ago the tranny started acting up and not downshifting it just stayed in 3rd gear. i traced that problem down to the pcm and got another pcm and that solved the problem. just recently it started up with a different issue. 1st gear is fine its my second gear that and sometimes 3rd gear that completely disengages from the engine. not like a slipping tranny i know what that feels like this is more like the lock up solenoid is disengaging for some reason or it might be something else. so 2 questions here.. does anyone know where the lock up (tcc) electrical pigtail is for that solenoid so i can test the resistance in its circuit. 2nd does anyone have any other ideas to what it could be?