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6 V Horn relay using 12 Volts

Your old Chris-Craft electrical system can be a challenge. If it runs on "juice" pose your questions and offer your advice here.

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George Emmanuel
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Joined: Mon Apr 10, 2006 7:44 am
Location: Gainesville, Florida

6 V Horn relay using 12 Volts

Post by George Emmanuel » Fri Oct 07, 2016 6:58 pm

Will the original 6 volt horn relay work using 12 volts? I'm upgrading my '55 Sportsman to 12 volts.

George

Dbhardin
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Joined: Mon Jul 13, 2015 1:22 pm

Re: 6 V Horn relay using 12 Volts

Post by Dbhardin » Fri Oct 07, 2016 8:01 pm

Mine works just fine, only twice as loud

jbyers
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Re: 6 V Horn relay using 12 Volts

Post by jbyers » Sun Oct 09, 2016 11:21 am

That brings up another question if you don't mind. My 58 Cavalier is 12 volts. I bought a nice horn on eBay advertised as 12v which turned out to be 6v when I took it apart. Do I need to change my existing relay from 12 to 6v?? If so, where do I get one?

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mbigpops
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Location: Eastern Massachusetts

Re: 6 V Horn relay using 12 Volts

Post by mbigpops » Sun Oct 09, 2016 3:42 pm

You can use the existing relay if you add resistance between the relay and horn.

Mark
1953 CC Rocket Runabout "Rocket Man"

jbyers
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Re: 6 V Horn relay using 12 Volts

Post by jbyers » Sun Oct 09, 2016 5:47 pm

Thx Mark

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mbigpops
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Location: Eastern Massachusetts

Re: 6 V Horn relay using 12 Volts

Post by mbigpops » Sun Oct 09, 2016 5:58 pm

I started with a one ohm, 25 Watt ceramic resistor but the voltage dropped too low for the horn to beep. I added another one ohm resistor in parallel to make it 1/2 ohm and it worked great and yes it is very loud.

Every time I let someone drive the boat they go to change the throttle position and accidently hit the horn button and practically jump out of the seat.

Mark
1953 CC Rocket Runabout "Rocket Man"

jbyers
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Re: 6 V Horn relay using 12 Volts

Post by jbyers » Sun Oct 09, 2016 7:13 pm

funny

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