I have a problem with a new to me 2005 5 spd base. Minor accident by PO deployed frt airbags. He drove it like that afterwards daily for a month with no problems. Then one day he turned on the key and no power to anything, no dash lights. Fully charged battery, good starter, good ground. Doesn't appear to have a BST just off the battery in the engine bay.
Searching for answers here on numerous threads but still not sure - can the airbag/inertia switch module under the emer brk kill power like this? Sorry if this was a duplicate. Misplaced on an old thread initially. TIA, Ron

 

did you test-light power wires to the fuse box?

if the battery wasn't properly charging, it could die in this time frame. In other words, having a fully charged battery last month doesn't mean it is fully charged now; unless you tested it now!?