Can anyone offer some suggestions of where to look ???? My 1990 W-250 abruptly died on me the other day coming out of town.Neighbor saw me on the side of road and pulled me home.I changed out the ignition switch on the steering column thinking that was it because I have no power to the dash when the switch is turned on.I also changed out the coil on the firewall remembering a incident a friend had and he had a coil die shutting his old chevy off.Nope,not that.I discovered the throttle linkage spring was broken,replaced that.I was looking through my Haines manual and saw there was a ASD (automatic shut down) relay that could be the cause,ckecked it with my metermapperars to be okay. All fuses in fuse box good.Still no power to key switch.I,m trying to become more adept at electrical issues but is a struggle.Can someone offer some help please on where to look and test????