Wiring problem

[88jimmy4X4]

i have a 1988 gmc jimmy 4X4 fullsize that i'm having some type of shorting out issue. I've replaced my fuel pump, fuel pump relay, ecm, starter, and alternator. the problem is that it will sit and run fine but as soon as you start driving and hit a small bump it blows the ecm fuse. i bought a book but its no help. i've been told its called a vibration short but i really need some help anyone got any ideas?

 

[happy 2011]

Wiring diagram for that fuse. See whats on the cirucit and see where the wirs for that circuit go. Then run the tk and move the correct wiring harnest around till you make the fuse blow. Should se fairly simple to do once you see whats on the diragram and follow it.
Also look for spots in ythe wiring harnest that have rubed thru the plactic wrap. That will be a clue to ya.

Good luck