91 buick park avenue

the other night I locked the keys in my car, & had to break into it. When I did the alarm started going of couldn't find the keys right off so I unhooked the positive cable on the battery. When I hooked it back up the climate control messed up, display doesn't come up at all, heater was coming on when car started, but now the ac comes on. When I turn the headlights on hear a buzzing and lights flicker till ac or heater shuts off. I've cleaned the battery post good, but no change. I have now located where the buzzing noise is coming from, a brown box above the fuse box on the drivers side. The numbers on it are 25601510AJG, does anyone know what this is. Also now the ignition is messing up. It starts most the time, but sometimes when I turn the key over everything comes up, except display on climate control, but it won't even try to start. If I wait awhile and try it again after 5-10 minutes it starts right up. Does anyone know what the heck is happening. Please help.

What did you do to break into it? I would say the car is p-ed off at you for breaking in.

I'd try to disconnect the NEGATIVE battery cable (the black one) for about an hour or so. That will let anything power-related to the car reset.

What did you do to break into it? I would say the car is p-ed off at you for breaking in.

pulled door skin out some and reached inside the door and turned the lock

Turned the lock huh... reset the car with the battery cables.. should solve the issue.

well disconnecting the neg battery post didn't do it, I have taken the climate control out of the dash and the air still comes on when starting the vehicle. I don't know whats going on.

I have the same problem with the heating and cooling. it wont come on it doesn't show the temps or heat the car and its very cold please help!!!!!!

I have the same problem with the heating and cooling. it wont come on it doesn't show the temps or heat the car and its very cold please help!!!!!!

You probably have problems with your heating control module. It controls the heating and cooling.. could also be as simple as a blown fuse. Check those things out and let us know.