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Author Topic: SPST switch to car battery  (Read 763 times)
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I bought a 12vdc 30a spst switch.  I'm wanting to hook it up to my car battery and use it to turn my radiator fan on and off.  Do I need something in between the switch and battery?  Thanks for your help
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I bought a 12vdc 30a spst switch.  I'm wanting to hook it up to my car battery and use it to turn my radiator fan on and off.  Do I need something in between the switch and battery?  Thanks for your help

A fuse would be a very good idea.

Not sure what current your fan motor draws but automotive parts stores stock these kind of fuses and inline wired socket holders.

http://www.allelectronics.com/make-a-store/item/MATC-10/10A-MINI-ATC-BLADE-FUSE/1.html

http://www.allelectronics.com/make-a-store/item/FHP-25/WEATHERPROOF-ATC-BLADE-FUSE-HOLDER//1.html

Lefty
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So do I need to use the relay and the fuse thats under the hood.  They both still work.  I believe it was a 30a fuse but could be 10a.  I'm hoping the fuse would be all I need, what you think?  Thanks alot for your help.

P.S.  I also believe I have to get a 16g wire or bigger, sound right?
« Last Edit: May 12, 2011, 10:25:38 am by demonic_crow » Logged

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http://www.radioshack.com/product/index.jsp?productId=3111494

Thats the switch I have.
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