My son shorted out his obd port!

Son tried checking codes with a paper clip and put
the clip in the wrong pins! He said
immediately...the horn came on...black wiper
running and washer fluid was spraying everywhere
constantly...hazard lights came on but weren't
blinking! What could he have possibly shorted out
or blown! The only way he could get everything to
turn off was disconnectin the battery. I looked at it.
I found out that even wit the car off there was drain
on the battery. I had to pull the horn fuse...back
wiper fuse...hazard light fuse...and dome light fuse
to finally get no amp pull on the battery while the
car was off. Im not sure where to go from here. All
fuses are fine. I've checked them all. Also has no
turn signals but headlights work fine. Wow and as I
write this he just calls. Car was starting fine. He
told me he disconnected and reconnected on the
wires on the steering column and junction block
hoping to reset the ecu. Now the car cranks but
won't start. He said it started the first time...but
only for a second then immediately turned itself
off. Now just cranks. I'm at a loss. Not great with
electrical issues like this.