I have a 1996 Geo Prizm, which is identical to the Toyota Corolla. The engine light has been on a few days and today I tried shorting out the two terminals in the diagnostic box to check the code but the engine light does not flash at all as it is supposed to to let me know the code. I know I'm shorting the right terminals because I have the manual for this vehicle and have double checked this. Also I tried once with the engine running and the RPM dropped when I shorted it, so I know it's making contact. I'm using a metal paperclip. I tried shorting then turning ignition to ON and also turning ignition to ON first then shorting, still the engine light doesn't flash, it just stays on. What am I doing wrong and how can I find out what error code I have?
Thanks,
Casey