i dunno whats goin on with any of it the hole system isnt working it wont even turn on or blow out air or the heart dont work it is like itz not even hooked up or somthing

 

There is a ground wire that is on the firewall in the engine bay. Its on the passenger side, up high, kind of between the middle of the car and the a/c stuff. That ground wire that bolts to the firewall is the ground wire for the heater controls. Maybe tighten down that bolt and check the condition of the wire. I know without that ground connection, mine won't work at all. This is on my 86 though, I haven't worked on the 92 enough to know if its in the same location.

 

On my '83, there is a high-current positive conductor, right under the bottom of the radio. It is split with a flag connector that cooks and ruins the connection.

Seth