1986 Chevy Camaro Error Code Reading for 86 Iroc TPI

Electrical problem
1986 Chevy Camaro V8 Two Wheel Drive Automatic 115k miles

Once you short the two pins that you need to short together and it starts displays error codes how do you what code is being displayed my haynes repair manual book tells me it starts off with code 12 which is one flash followed by a short pause, and then two flashes in a quick succession but it doesn't tell me what the light will do for all of the other codes does anyone know where I can get this info.