Electrical issue, 1991 4x4 suburban Earlier today my 1991 Chevy Suburban (4x4, auto, mostly stock electrical and drive train) blew the PCMB fuse. After replacing the fuse I tried to start it resulting in another blown PCMB fuse. After checking different things (and blowing a fuse with each try) I was able to get it started not knowing what caused the issue. I just now got it home, turned the switch to kill it only to discover it kept running. I grabbed a pair and insulated channel locks and pulled the coil wire from the distributor, and disconnected the ground on the battery. Now I am wondering what is between the PCMB fuse and the ECU. Is it a relay (makes sense and if its sticking would cause the issue I am having) or is it just the ignition switch (makes less sense, but if defective could cause the issue also). In the AM I plan on finding my Chilton and looking at the wiring diagram.