How do you read the fault code in your 89 Jeep Comanche within line 6?

To read the fault code in your 1989 Jeep Comanche, you need to locate the diagnostic connector, usually found under the dashboard near the steering column. Use a jumper wire to connect terminals A and B of the connector. Then, turn the ignition key to the "On" position without starting the engine; the check engine light will flash a series of codes that correspond to any fault codes stored in the system. Count the flashes to determine the specific fault codes as per the Jeep's service manual.