How do you get diagnostic codes from 1993 Ford Tempo 2.2 liter?

To retrieve diagnostic codes from a 1993 Ford Tempo 2.2 liter, you can use the onboard diagnostic system by connecting a jumper wire between the "ALDL" (Assembly Line Diagnostic Link) terminals A and B in the diagnostic connector. Once connected, turn the ignition key to the "On" position without starting the engine. The Check Engine Light will flash a series of codes on the dashboard, which you can then interpret using a code chart specific to the vehicle. Make sure to refer to a repair manual for the exact meanings of the codes retrieved.