Problem with signal lights blinking too fast

check for blown bulbs

Yes, second that. Other, less likely, problems, are a problem with the BCM, or the turn signal relay or multi-function switch.

where is the turn signal relay located? My signals intermittently work. And the automatic door locks, because these don't work anymore.

Yhe bulbs are blown, and needs to be changed i had the same problem.

Burnt bulbs almost always.. warning buzzer should come on

I have changed the bulbs front and back. The same really fast flashing goes on. The bulbs I took out I tried them in the other side and they work perfectly.