Cockpit SRS issue

  • I have an issue with one regulator in a Cockpit SRS (due to my mistake in polarity connection)...;(

    Now the only way to turn on/off the left side is connected/disconnected the battery, since the switch have no input on this side. Nevertheless when both battery are connected all functions&indications works perfect.

    My question is: Did I damage the regulator in the PB? or did I burn just the affected side in the switch??

    And the last question: if the problem is in the PB, there is any tech service in USA to send it for repair? or only in German?