2005 head unit wires

Hey, just bought a 2005 Tacoma X-Runner and installed the Dasaita head unit. It seemed like everything was working fine, but then driving I noticed that the following strange things happened.

1. No AC. The AC button does not illuminate when pressed. Air blows, but not cold.
2. Air bag light is on on the dash.
3. Turn signals don't work (hazards do).

A previous owner had done some sort of install and there were a few unconnected wires (see attached image). Do any of these 4 wires look familiar? The purple-pink wire appears to have power when in reverse. At some point the purple and white wire touched and seemed like some fuse blew.

Any help is greatly appreciated!

Neil

 

Solved. My issue was the IG1 fuse under the dash. Replaced it and turn signal works, AC works, and air bag light is off.