I have a 94 camaro that the engine light comes on sometimes I know that you can put a jumper on the plug under the steering column. problem is I cant remember witch two terminals I jump and I dont have a list of the codes. can anyone help?

 

With the key on, jumper pins E&F. The engine light will start to flash giving you your codes.
Here is a rough diagram of the DLC to show you what pins to jump:

|ABCDEF|
|GHIJKL|