1. Locate the Diagnostic Connector: This is usually a two-wire connector under the dashboard, often near the steering column. The exact location might vary slightly depending on the trim level. Consult your owner's manual for the precise location.
2. Use a Scan Tool or Jumper Wire Method:
* Scan Tool: The most reliable method is using a dedicated OBD I scan tool. These tools are often available at auto parts stores.
* Jumper Wire Method: This involves using a jumper wire to short specific pins in the diagnostic connector. This will cause the check engine light to flash a code. This method is less reliable than a scan tool and requires careful interpretation of the flashing light pattern. You'll need to consult a Buick Century repair manual specific to the 1995 model year to understand the flashing sequence and what the codes mean. The manual will show you which pins to connect.
Important Considerations:
* Repair Manual: A 1995 Buick Century repair manual (either a Haynes or Chilton manual, or a factory service manual) is essential. These manuals will provide the specific diagnostic trouble code charts for your car. Without the manual, interpreting the codes is very difficult.
* Year Specific: The codes and their meanings vary by year. A manual for a different year Buick Century, or even a different GM vehicle, will not give you accurate information.
In summary, there's no single list of codes I can provide. You *must* use a scan tool or the jumper wire method (with the appropriate repair manual) to obtain the diagnostic codes for your specific car's problem.
