Now I am going to mess it all up.
Its an intermittent electrical problem. So lets say the heater control panel draws 2 amps,the multiples 2 amps, pcm 2 amps,the clock 2 amps.
This equals 8 amps blows the fuse

rite. So we unplug connector c killing a 2 amp draw now we only have 6 amps on a 7.5 amp fuse

it will not blow. But lets say the clock is only normally going to draw .5 amps do you see what I'm saying? The clock is the problem not the ecm.
Also some times when things heat up thy draw more amps take this into consideration.
I STILL THINK ITS THE WHITE YELLOW OR MAY BE THE ECM. But some times shit gets tricky.
My back up plan if you run into this and its not fun. You will have to put a 5 amp butt fuse

on all 4 white yellow wire in each branch and see what happens.
One last piece of advice call your dealer and have them do a Vin check for recalls some had a multiplex recall and you would get it installed for free. I should have told you sooner but i forgot.
HAVE FUN LOL.