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My name is ***** ***** I am a professional here at Just Answer. I noticed that your question had not received a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.If you no longer need help post a simple reply to let me know.
If this is a factory installed navigation system then it should not drain the battery unless there is an issue with the navigation control unit itself internally.If this is an after market installed the system you will need to have the wiring checked leading to it to see if it was wiring that is wired incorrectly causing this issue here.
You will need to have a parasitic drain/draw test performed to locate the exact component causing this issue here.If you would like the procedure on how this is done let me know.
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