No crank, no start, no click?

Okay. So, I don't think this was the problem. I am going to put other cluster back in. When it was scanned cluster was not showing up on scanner. Since then, I have checked voltage through fuses and relays all are good except once for ECM it was blown. Put another one in and automatically popped. The new battery is drained so I have a parasitic battery withdrawal going on. Checked with a multimeter and it had back feed through the ECM, also found 2 cracked coils. So, I obviously have either a short in wiring or ECM is fried. Apparently, this ECM was replaced prior to me buying it. When it shut off in parking lot blower fan would not shut off either. I scanned with my cheap scanner, and it would not even let me into it to hook up to scan for codes. I cannot remember code right off hand but when I looked it up no communication with computer. Wondering if this is why cluster was not showing up on my buddy's snap on scanner. So, my question is, how do I know if ECM is fried? How do I find short if there is one? And should plugs and all 4 coils, not just the 2 that are faulty, be changed? And will this PATS relearn have to be done as well? The ECM I can take to someone to get programmed if needed as car will not start to get to a dealer. And it's a 2010 as well. Also wondering if this issue is why scanner would not pick up instrument cluster?

Fuse Is # 29 that keeps blowing? I have ordered all new coils. Is there a way to test a non-starting car's PCM?

Thank you for your assistance. So, I did the test with the PCM unplugged, 15 Amp fuse did not pop. Repeated the test with the PCM plugged in and it popped right away. Ignition doesn't even have to be turned on. It blew. I repeated the test, by plugging harness back into ECM and 1st plug caused fuse to blow. Left side of fuse was getting full power of battery and right side of fuse was.48 when tested with multimeter. So, I pulled ECM out to inspect. Plugs and wires are all in good shape, but ECM is dirty and corroded and green. On the back has a space in the seam that has a split. So I have to assume at this point between the coils and ECM in this kind of shape it's my problem. Now, I have an ECM I am picking up on Monday from a wreckers. Same make and model, codes, etc. My question is will this have to be flashed? Will the keys have to be programmed as well? I guess this can be taken as a warning for people to check their electronic system more closely. I just purchased this car a few months ago.

Thank you for the great info. I am going to put used one in for now as I have to get car up and running ASAP and I live in Canada. You mentioned directions below is that the PATS relearn above? I will definitely look into this company and get one for back up, as we plan on keeping this car for a few years as it is in great shape. Pins and connectors are all in good shape and I will double check the wiring harness as well.
Thanks for your help again. And Happy Easter.
Bob

I have added an arrow to pic of connection that caused fuse to blow. So I have to assume no short in wiring definitely ECM with the shape it is in.

So, an update, car is up and running, 6 weeks later, ordered a remanufactured one that wasn't programmed to my VIN, as stated by company. I know I picked the wrong company by amount of time it took to get it and one of the black separators by pins is not there. I should have used the one you mentioned but I picked this one because of closer location to me. I should have read the reviews better, I guess. Showing up as a ford fusion on scanner. So had to take to the dealer anyway for programming and keys. The keys were expected with the pats system. Now I have another problem, wondering if they need to be reset because new ecm? Yellow maintenance wrench and airbag light staying on. Going to do an oil change, etc this weekend? And try to reset maintenance setting. These lights were on when left dealer but car is running and driving perfectly and they were not on before different ecm was programmed. Any ideas? No other codes showing up in system either.