installing a HORN

[vso737]

Hi,

I'm installing a HORN that recommends using a relay and a 30AMP fuse.

My new wiring harness dedicated HORN wire, with relay, is fused at 20AMP.

I assume LOWER amperage is OK.  Should I also install a 20AMP fuse link near the horn for extra measure?

Is it normal for horns to be rated at such a high amperage??

Thank you in advance,
Mike

[unklian]

LOUD horns need a lot of amps.

[vso737]

LOUD horns need a lot of amps.

YES, the horn in question requires 30 AMPS.

Isn't that what a RELAY is for?

I guess my question is, ¿Will the 20 AMP relay suffice?
or do I have to install an inline 30 AMP FUSE and a 30 AMP relay near the horn?

I intend on calling the manufacturer after the holidays- I know there's an answer somewhere.

Thanks again,
Mike

[enjenjo]

For a 30 amp circuit under 5 ft, you need at least 14 ga wire. Over 5 ft 14 ga is marginal, but probably ok for intermittent use. If the wire is at least that big, a 30 amp relay and fuse  would be all you need.

[vso737]

For a 30 amp circuit under 5 ft, you need at least 14 ga wire. Over 5 ft 14 ga is marginal, but probably ok for intermittent use. If the wire is at least that big, a 30 amp relay and fuse  would be all you need.

_____________________________________________________________

My horn wire is 14 ga at the engine compartment.  The wire is fused at 20 AMP at the fuse box and I assume the horn relay, at the fuse box, is 20 AMP as well.

I guess my question now is whether to put an inline 30 AMP fuse and 30 AMP relay on the wire at the engine compartment attached to the horn- or attach the horn to the current wire on the 20 AMP setup.

Thanks a bunch,
Mike

[enjenjo]

If it has a Box type relay it is more than likely rated at 40 amps for the load. I would try it as it is, if it blows the fuse, and you have 14 ga wire, try a 30 amp fuse. It's an intermittent load so it should be fine.