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fusing a horn

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I put a horn on my plated E, stealing power from the headlight wire and grounding the horn to the frame. The switch is a Trailtech 3-position switch. I'm using the kill switch for the horn button.

So I read somewhere i should put a fuse in the horn circuit.

1) why? small words, please, I don't get the electricity thing too much
2) where? power in to the horn or ground out of the horn?
3) amp rating? the horn says 1.5A, which I assume means 1.5 amps

Thanks

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1) i'm not sure it's necessary, but it won't hurt.

2) usually a fuse is placed in a power to device wire so that when smth goes wrong, fuse will blow and cut the power to device.

3) u need fuse with more amps, so that it's blown only when something goes wrong. In 1.5A case I would put a 5A fuse.

Edited by Yanka

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Pointless. A DRZ (all models) only have 1 fuse. (except kicker that had no fuse).  Why worry more about a horn than the head light?  Your wiring connection will work fine.  However typically the horn has power to it all the time and the horn switch is on the ground wire side.  No matter, it will work either way.

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