Weird Turn signals and Heater/Fan

ok my dad was driving the family's 1993 plymouth Grand Voyager LE and when ever he turned on the turn signals he would get the BREAK light and a Buzzer going off and the turning lights dont turn on... i got out and looked at the signals to ceck them out... the emergancy four cornor lights light up tho :confused: then when he tried to turn on the fan he got the break and air bag light and the fan didnt turn on either... :confused:
any help would greatly be appreciated