I don't think there's any reset procedure for the voltage regulator, your caddy has some wonky 50's tech lol.
All I can say for testing the regulator is to check battery voltage especially on startup and higher revs.
Now that you mentioned the lights flickering even with the engine OFF, I would suspect a short even more.
Is there any constant behaviour with the flickering? Can you stop it in any way, shutting off the car, toggling lights on/off. Does the flickering last as long every time? If you disconnect the battery during the flickering and reconnect it, does it contiinue?
All I can say for testing the regulator is to check battery voltage especially on startup and higher revs.
Now that you mentioned the lights flickering even with the engine OFF, I would suspect a short even more.
Is there any constant behaviour with the flickering? Can you stop it in any way, shutting off the car, toggling lights on/off. Does the flickering last as long every time? If you disconnect the battery during the flickering and reconnect it, does it contiinue?
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