A few days ago after driving truck all morning I got in to start and engine would turn over but wouldn't start. Once I had some assistance get home I checked fuses under under and fuel pump relay,all worked fine. I then checked tank and could not hear pump engaging. We moved bed and replaced pump. Before replacing bed I tried to start and and PCM fuse blew as soon as key was turned on. I've read other PCM threads about O2 sensors etc.but I figured it must have been something I did as there was no problems before I removed bed and replaced pump. Is there anything on the PCM circuit I could have nicked moving bed?

 

What is the fuse number per the owner's manual? Which fuse box?