Ok, it's been a while since I've posted. Had an up pipe go on my 350 crew 6.0 and the firewall got so hot it fried the VSM. Needless to say that I am having issues with my door locks but I am also not able to use the 4wd. No light on the dash or on the selector switch. Is the VSM interconnected with the 4wd circuit? I have also gotten deep into the dash to inspect the harness. All the wiring I have inspected looks to be in tact. Any insight would be great.