Battery good, no lights, no start

[Ricardito]

I had a problem with my seatbelts when my child's seat was in the car. Disconneced wires. Worked good. Installed new lights in the instrument pannel. After putting the airconditioning knob in and turning it, it has refused to start. No lights, no power to the fuse panel. The only place I get power is to the buzzer when I put the key in. Any ideas?

 

[whitenemesis]

Reverse what you have done and see if it resolves the problem!

You have done a number of different things, try to seperate each and see what happens.

The aircon bit seems rather odd, problem with the aircon unit before?

 

[Legoman]

sounds immobilizer based to me if your getting no power to the fuse panel.