[MattMason]

Shalom.. peace and blessings to you.. can anyone give any help on this..
My car was starting slowly, and then it wouldn't start, it would just click..

I had it towed home, changed the starter, and a few coolant lines while I was at it.. got it to start.. drove it and brought it back home and then it would click but not start, however the water pump would turn on. This was a month ago now, car has been sitting in the garage.

Then I checked the starter and found the B+ connection a little loose, so I tried to torque it up properly and didn't detect the click from the wrench and broke the post.. so then I replaced the solenoid, I changed the main engine ground strap and charged up the battery and reinstalled it and then it wouldn't even click.. just a bunch of no communication errors, wipers turning on and the main thing is the terminal 15_3 line from CAS short circuit that I don't know how to check.
also the interior trunk light doesn't come on when I connect the battery along with the shifter console and glove box light.

Installed a new battery and registered it and still the same issue.
It's so weird because it seems like a lot of things are working but then some things aren't working.. I can access all the modules through protool and perform some functions but not everything..

The key fob works, the steering wheel isn't locked, but no idrive, no shifter, no gauge backlit, can't operate the windows using the window toggles, no radio or hvac controls.. no click, no start.. I hear all the relays clicking..

I believe this is just a power distribution disturbance somewhere.. I checked a whole bunch of fuses, almost all of them and they are checking out ok..
Chat gpt suggests that the B+ cable to starter may be broken internally.. but would that really cause all this??

Unfortunately this is getting quite beyond me, I don't really understand the 332C terminal 15_3 line from CAS short circuit to ground, or at least how to check that. I don't have ISTA or INPA and I'm not too electronically inclined..

Any help is appreciated.. for now I'm thinking about getting it towed to the shop.

Peace and grace to you fellow BMW owners...