12004 Ford Mustang Electrical Problem with Dash Cluster

mustang with 3.8L V-6 engine has a dash cluster electrical problem that is happening randomly. The cluster loses power at times off/on while the engine is running. The instrument cluster gauges all go to the off positions, including the speedometer as well. Previously only the battery light was flashing on/off randomly and thought it was just faulty. Now this problem has arose. We don't know if the engine light ever came on during the instrument dash gauge power loss. Do you think there may now be a stored computer code to help identify this gremlin? Otherwise is there a relay or circuit breaker that may be the cause? How do you track this down to repair and will it damage anything if it continues? So far the engine is starting and running normally.