Wiring a Fan

Printed From: the12volt.com
Forum Name: General Discussion
Forum Discription: General Mobile Electronics Questions and Answers
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=3737
Printed Date: June 09, 2024 at 6:46 PM

Topic: Wiring a Fan

Posted By: InstallForFun
Subject: Wiring a Fan
Date Posted: September 17, 2002 at 7:09 PM

I am upgrading the sound system in my '94 jeep grang cherokee. Im going to take out the stock amp under the rear seat and replace it with a Kenwood 4 channel amp. On the other side under the rear seat Im going to mount an Autotek amp for my sub. Thats going to be about 600 watts RMS under someones butt. I really dont want to fry either amp so i want to add a pair of dual 60 CFM 12VDC computer case cooling fans. The fan wiring has 2 wires coming from it, a black and a red. Obviously these are negative and positive, respectively. I was wondering if there was a convienient/cheap way to make an automatic switching device so I dont have to worry about flipping a swith every time I crank my music up. I want a psuedo-remote wire set-up. I don't know whether it's feasible or not, but thats why Im asking. Thanks for any help.

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--Mark

Replies:

Posted By: bberman1
Date Posted: September 17, 2002 at 10:11 PM

What you need to do is add a relay. You connect the relay to the remote wire on your head unit . The fans will then turn on and off with the radio. If you need any more help don’t hesitate to ask.

Here is a diagram of how to wire it

87 - Constant
86 : GROUND
30 - Remote Wire Accessories ( amps, EQ's fans )
85 : Remote Input from HU
87a: NOT USED

Posted By: F4Pilot
Date Posted: September 18, 2002 at 3:01 PM

Thanks to the 12volt.com and all the cool installers that help us out! posted_image

https://www.the12volt.com/relays/relays.asp

You probably dont need fans that big (opinion). They make much smaller fans that will do the job and are much quieter!

Posted By: InstallForFun
Date Posted: September 19, 2002 at 4:51 PM

Thanks alot for the advice. you guys are a great help!

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--Mark