computer fan for cooling
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=28311
Printed Date: August 12, 2025 at 8:33 PM
Topic: computer fan for cooling
Posted By: u5711
Subject: computer fan for cooling
Date Posted: March 13, 2004 at 5:32 PM
alright, so I have these 2 fans that were in an old computer and Ive heard they can be used to cool an amp. anyways, how would i go about setting these things up to run? moreover, how could i just test them to see if they still even work? there is no switch or anything, just 2 wires. ive tried to just put the wire ends next to some small batteries (not car ones) and they wouldnt spin but I dont know if it should do sh*t.
Replies:
Posted By: xetmes
Date Posted: March 13, 2004 at 5:58 PM
if they are 12V they need about 8 just to turn, throw it on 12V to see if it works
Posted By: DYohn
Date Posted: March 13, 2004 at 6:16 PM
Most computer fans are 12 volt fans. The red lead is, I believe, negative. To test them touch the leads across your car battery. If you use them, you will need to use a relay to switch power for them.
Posted By: ravenndude
Date Posted: March 13, 2004 at 6:34 PM
or you could try putting them in parellel with your amp.
Posted By: DYohn
Date Posted: March 13, 2004 at 6:45 PM
ravenndude wrote:
or you could try putting them in parellel with your amp.
Actually that's not a good idea as they would then stay on all the time.
Posted By: ravenndude
Date Posted: March 13, 2004 at 6:54 PM
true ... didn't think of that. since the remote turn on it a steady 12v and only turns on with the Head Unit you caouls put it in // with that and a ground.
Posted By: DYohn
Date Posted: March 13, 2004 at 6:58 PM
Your logic is correct, but most fans draw too much current to run off the remote lead. You'll end up blowing a fuse in your head unit (or worse, frying the main board). A relay operated off the remote lead is the only safe way.
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