How do you check the trouble codes on a 1989 Dodge colt?

To check the trouble codes on a 1989 Dodge Colt, you need to locate the diagnostic connector, which is typically found under the dashboard near the steering column. Use a jumper wire to connect terminals A and B on the connector. Turn the ignition key to the "On" position without starting the engine, and the check engine light will begin to flash, indicating the trouble codes. Count the flashes to interpret the codes as per the vehicle’s service manual.