2009 pontiac vibe
husband tried to install a new bluetooth radio system thing in car.
swears he only touched fuse #7 - install failed, so he put the old radio back in. old radio still works.
HOWEVER, turn signals, heat/ac/fan controls, and passenger airbag light are now dead AND some new dash lights are on (airbag, VSC off, traction and check engine light).
does it seem like this is just a blown fuse (and some DIY code resetting) or does this sound like he fried something and it will require professional assistance?
car talk hive mind, please advise