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I a upgrading my horns on my toyota hilux invincible 2008 the kit comes with a relay. Does the existing horn circuit have a relay already because it is powering 2 horn already? or do i have to add this new relay ?

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The relay is to allow the new horns to draw full power from the battery. They won't be nearly as loud if you don't wire it the way they suggest, and you may still blow the fuse.

Posted on May 09, 2011

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Where can i find my horn relay on my 2006 Toyota hilux


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    read the confusion here, for GEN 7 pickups.
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    see why i cant find yours,? tocama., tahoma or hilux.
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    Someone would need to test the relay and the circuits it controls.
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    Your horn circuit is very simple. It consists of the primary circuit, which controls the relay coil and the secondary circuit that applies voltage through the relay contacts to the horns.

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    Battery power is supplied to Pin 1 of the horn relay. Pin one of the relay connects to both the relay coil and to the secondary main contact.

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    When the relay coil is grounded by the horn switch, the relay contacts come together (that's what makes the clicking sound) and supply voltage to the GREEN/WHITE wire that connects to the horn assemblies.

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