Hey guys. It's been a while since the truck has been running like a top. The truck shut down on me a couple of weeks ago on the way to work. It would crank but no start (and no glow plugs light). It turned out the ECM1 fuse had blown. In an effort to troubleshoot the cause I replaced the fuse and the darn thing fired up. At this point it will start 3 out of 4 times before it blows a fuse. Any ideas what the culprit might be? All of the harnesses "seem" to be OK. Would a bad shutoff solenoid or FSD cause this? Should I did deeper into the harness? I'd like to get to the bottom of this, but I figured I'd check with you guys for guidance. A search of the archives came up short.

Thanks!