LLY ECM Fuse #4 Blown

[Roc8man]

My 2004.5 LLY was pulling my toy hauler out of storage and about 10 min into the ride back to home, my truck suddenly died. After trying a few things I checked the fuses and the #4 ECM fuse was blown. Popped in another and it blew right away. Had the truck towed to a shop since I was going hunting (took my buddies truck and my toy hauler). They pulled the ECM and cleaned the connectors and it was working again. I picked it up this past Monday (2 days ago). Then I blew the same fuse again and tried 7 more before I gave up tonight and left my truck at work. Any ideas what is wrong? Is the ECM going bad? Bad ground?

Thanks!

 

[Bonestock]

You have a short lol! No seriously you should be able to isolate the components that are on that circuit. Unhook the positive battery lead and go in series between the battery post and cable with a test light or multimeter in place. Start isolating one thing @ a time in that circuit by unplugging and watching the test light or multi meter. You may need to get an electrical diagram to view what all is on the circuit and what components to isolate.