“Have wireharness and single din install kit My question is do I need to run a power cable from battery terminal? Because sony recommands that If yes than geek squad do that?”
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Yes! You need to run to the battery to maintain the memory in the Sony Unit ( or any brand of radio I've looked at). This is where your radio presets and other items you configure are stored. I would think the installers at Best Buy should certainly be aware of this and run a line to the battery during the install.
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