223000 miles without electrical problems, but halfway out the driveway today it shut off and refused to start. I have a code u1800 for no communication between ecm and ficm. Preliminary check on the wiring and fuses revealed nothing, but I don't have power on pin 118 Injector supply voltage at the FICM. Is this my problem? Any idea where I need to go to fix it? I don't have identifix anymore and have been all over google, but can't seem to find anything. Going to attack it in the morning, just thought I'd give yall a chance to help with it!