LowCaliTi

i got a "VISIT WORKSHOP, DISPLAY FAULTY" today. My turn signals and windsheild wipers are not working. i looked in my manual and it said that it was a "c2" wich could be fixed in the control pannel. i tried to reset it and there are NO malfunctions coming up now, but my turn signals and wipers arnt working still. can anyone help before i take it to the dealer??? by the way... i think this was all because my idiot friend unhooked my battery ground, while my key was in the ignition. i unhooked the battery for a while and tested fuses under the hood and in the drivers dash. in the fuse manual it says that turn signals are "eletrical" where it would say the fuse # or location. can anyone help???? (01 c240) thanks