My heater control has gone conpletly dead. That is at times it work only when it wants to. I tryed puting a new one in and have the same problem. When it does this the button light are on when the dash light are off when i turn the dash lights on the button lights go out. People I have talked to say it could be a bad ground. I?m not sure where to look. This is in a 92 silverodo. 1500. Any help would be greatly welcomed.
Mike