getting codes for 94 grandprix

Good morning all. A friend of mine wants me to look at here car. She says it is running rough. The CEL is coming on. Can anyone tell me how to get the codes from the computer? Is like my sho? I mean I know it has the old OB1 like me. But in my Old dodge I used to turn the key oiff-on-off-on or some thing like that and then the CEL would flsch my code. But in my SHO I junpo a couple of pins and the computer does some checks then spits th coeds out at me. How do I check them on this 94 grandprix and is there a list of codes some where?

just going back .. I know I should double check spelling but was in a hurry.hehe I think you can make out what I was saying

94 may be the obd 1.5 issue which requires a full function scanner for codes. troublecodes.com for code listings.