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Why does my radio work only when lights are turned on?

Updated: 8/17/2019
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14y ago

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the radio is wired to the headlight power supply wire, that's why it will only come on when you turn on the headlights. my buddy did this to his truck in the best buy parking lot when it was getting dark out.

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14y ago
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Q: Why does my radio work only when lights are turned on?
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