tapping into amp power and ground
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=129263
Printed Date: May 09, 2025 at 1:35 PM
Topic: tapping into amp power and ground
Posted By: fronzizzle
Subject: tapping into amp power and ground
Date Posted: November 17, 2011 at 7:46 AM
When I was redoing the interior of my car, I ran all of the amp wires to the back of the vehicle - power, ground, remote on. After getting everything back together, I realized that I wanted to run LED lights, too. I'd rather not try to run additional wires back there now, I know I can use a relay to power both the amp and the lights but it it a bad idea to use the amp power wire to power the relay, too? Obviously I'd have to tie into it with a smaller wire (running 4 gauge). If it matters, the amp I'm going to be powering is going to be 300-400 watts max.
Replies:
Posted By: jmelton86
Date Posted: November 17, 2011 at 8:10 AM
4g can safely carry up to 150a @ 12v (up to ~1200wRMS worth of amplifier power) -depending on how long the run is.
So, since you'll only be powering a "300-400 watts max" amplifier, I'll say that your 4g will be fine to power a relay for your lights.
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2013 Kia Rio -90a alternator
DDX470HD GTO14001 GTO1014D (x3)
Big3 in 1/0G
1/0G to GTO14001
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