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Message: <blockquote data-quote="helotaxi" data-source="post: 392018" data-attributes="member: 550915"><p>If you are running an aftermarket head unit it should have a turn on lead for that exact purpose.  It will usually be a blue wire with a white stripe.  There might be a blue wire as well.  That is usually for a power antenna and only works when the tuner section is being used on the HU.  Many times if there is only one output it is a constant out put for whenever the HU is on that is used for amps and antenna.  If you have a factory HU and don't have a power antenna or the capability for one then you are likely stuck.  You can wire a switch into the lead and manually turn the amp(s) on and off but that's about it without spending a decent amount of cash for a linelevel convertor with a signal sensor and remote output.</p></blockquote><p></p>

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