Question about Pioneer DEH-4300UB Car CD/ MP3 Player
Check your Wiring, as it sounds like your Constant +12 volt wire is connected to the Switched +12 volt wire. This would cause all settings to return to factory, just like when you lose power due to a bad battery or battery disconnect. Since you switched off Demo mode, and it comes back, this has to be a wiring problem, or a defective unit, but more than likely a wiring problem. On most pioneer units, the Yellow wire is the Constant 12 Volt (battery) and the Red wire is the Accessory 12 volt (switched).
Posted on Mar 14, 2011
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Posted on Jan 02, 2017
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