The indicators are powered directly from the BECM so you need to check that for damp and corrosion.
However you might be lucky and it might just be confused. You could try locking / unlocking with the fob or, if that doesn't work, and you've got all your codes you could try disconnecting the battery for a while and see if it re-sets.
I'd strongly suggest a bit of reading before you disconnect the battery, especially as you are starting with an electrical fault that could be linked to the locking / alarm system.