HU on when car is off?

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=17899
Printed Date: July 27, 2025 at 6:15 PM

Topic: HU on when car is off?

Posted By: dkiley
Subject: HU on when car is off?
Date Posted: August 21, 2003 at 10:54 AM

I saw this covered before but I can't remember what it said or where I saw it. Sorry for the repeat.I have an Alpine CDA9813 and I want to be able to turn it on if the ingition is off. I took the "12v constant" and "12v switched" leads from the HU and combined the two, then connected to a 12v constant in the fuse block. It works, but will that damage the HU over time.

Replies:

Posted By: xetmes
Date Posted: August 21, 2003 at 11:27 AM

no it wont really make a difference, might drain your battery if you leave it on though,

Posted By: wvsquirrel
Date Posted: August 22, 2003 at 12:20 AM

Agreed. I've done this many times myself and never had a problem.

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Squirrel
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If its too loud, then you're too old
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Posted By: dkiley
Date Posted: August 22, 2003 at 6:58 AM

Great. Thanks guys. Now I'm hoping to get some feedback on my relay question and I'll be set.

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