Both the flashers and turn signals are located under the lower dash panel, in the middle. Older model the flasher relay are located behind the glovebox. Also in this area is where you will find different relays.
Disconnect the battery and remove the airbag fuse. Remove the airbag from the steering wheel. Remove also the steering wheel and the plastic housing. Disconnect the signal unit and mount the new one. Put it back the way you found it.