bersercci

Solved! First I found one 25A fuse broken in the CRD front box (see picture). Changing this had no effect though, still "No Bus". I gave up and was ready to take the car to service. I changed my aftermarket stereo Joying head unit back to MyGig and.... suddenly everything works again. Never knew that MyGig has any role in the car electronics.

I managed to connect the battery positive to car body with a wrench. Sparks flew etc ⚡ The car is 300C CRD 3.0 2009. When I turn the ignition to ON, lots of warning lights are on and "No Bus" displayed (see the picture). I do get Door/Trunk ajar notices and there is an icon (maybe chip?) below framed gear markers. Car starts and runs normally, but no function on turn signals or any gauges which makes driving a bit hazardous. Remote key fob does not work either. Any idea what I blew up? Just a bunch of fuses or the entire ECM? Which fuses should I check first? Where is the ECM actually located in 2009 CRD 3.0 so I could check if it gets power? Can I check if the ECM is ok? I did replace the battery already and have done an overnight-disconnect-battery-reset. "No Bus" just comes up again when ignition ON. Any help or idea how to diagnose is massively appreciated - Thanks. (Chrysler 300C CRD 3.0, 2009)