How do you manually diagnose Ford Festiva wb plus diagnostic link details?

To manually diagnose a Ford Festiva using the WB Plus diagnostic link, you should first locate the diagnostic connector, typically found under the dashboard. Use a jumper wire to connect the appropriate terminals to initiate the diagnostic mode. Observe the check engine light for any blink codes, which indicate specific trouble codes. Refer to the vehicle's service manual to interpret these codes and identify potential issues.