How do you find the computer diagnostic repair codes for a 1995 Buick roadmaster?

To find the diagnostic repair codes for a 1995 Buick Roadmaster, you can use an OBD-I scanner, as this vehicle is equipped with an On-Board Diagnostics system that predates OBD-II. Connect the scanner to the diagnostic port, which is typically located under the dashboard. Alternatively, you can perform a key-on, engine-off test by turning the ignition on and off several times to trigger the diagnostic lights on the dashboard, which will flash specific codes. For detailed code meanings and further diagnostics, refer to the vehicle's repair manual or an online database.