Moved from your other thread:

If you mean the Powertrain Control Module's C4 pin 25, the fuse is the 200amp fuse in the distribution box next to the battery. The service manual shows no other fuse in the line, which I find very unusual. Just know: There are many mistakes and omissions in the service manual. I suspect there IS an undocumented fuse in that line.

If you are trying to track down electrical issues without the service manual's diagrams (as bad as they are), you are wasting your time. If you find them hard to follow, it 's not you, its the poor documentation.