Disconnecting battery
I see that removing the negative terminal is always recommended when working on your car audio.
I have searched but didn't find an answer to these questions:
1. What do you lose when you disconnect the battery, ie presets, etc?
2. Do you have to enter some kind of code to reactivate the oem nav/audio head unit?
3. If you do lose information is there any way to maintain it while the battery is disconnected?
4. Any other problems with disconnecting the battery? Will I have to go to the dealer to get anything reset?
Sorry if these are dumb questions.
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