Nautilus horn on Speed3

nonopr said:
Yes you can, even if you swith to the 20a fuse the cables are rated to 45 amp. it is just the matter of how much amp those the fuse will hold.
Thanks
I don't think so. What wire are you talking about? I am sure the wire going to the stock horn will not take anywhere near 45 amps. That wire is somthing like 18 AWG. This is really dangerous advice - someone will smoke their wiring harness!
 
Umm ok...(confused) Now I'm hearing conflicting info. Does anyone know for sure that the stock wiring for the OEM horn will accept a Nautilus horn rated at 12 volts and draws up to 18amps?
 
nonopr said:
Ok, I have the damn horn in my car and no fuse has been blown at 15 amp and I did change it later to 20 amp and nothing . I just left the horn on for 5 minutes in my garage and with an infrared temp gauge the temp on the cable very low 80 degrees f.
I have had the horn with out the relay since day one. Thanks. And the cable is rated to 45 amp constant current. I just know because I am an electrical Engineer. Thanksssssssss. Not that you are going to use it for that rate.

Thanks Nonopr. i think I might order up the Nautilus horn. (rockon)
 
nonopr said:
Ok, I have the damn horn in my car and no fuse has been blown at 15 amp and I did change it later to 20 amp and nothing . I just left the horn on for 5 minutes in my garage and with an infrared temp gauge the temp on the cable very low 80 degrees f.
I have had the horn with out the relay since day one. Thanks. And the cable is rated to 45 amp constant current. I just know because I am an electrical Engineer. Thanksssssssss. Not that you are going to use it for that rate.
Hey Mr. Engineer. Check out this chart and tell me what size wire you are going to run 45 amps through.

P.S. It's from an SAE specification.
 

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nonopr said:
Any wire I want (stoned) The issue is if you can run 18 amps of that horn in "15 amp wire" Yes you can it would hold . So 18 amps in the factory wire is not a problem.
Have a beer and see your car burn, if that is waht your trying to tell me.
Note to potential employers: Don't hire this guy to design any of your products, or write the documentation either.
 
I guess the bottom line, the horn install will work, but there is a "potential" that there could be an issue with the amps running through the stock wire.
 
will it work and is it advised

It is not a question of will it work - it seems to and so that is the answer. Will it continue to work - who knows. The circuit was designed for a smaller horn with less amps - anyone that tells you to put a bigger fuse in doesn't car about your car. The simplest way to fix your problem is to run a $5.00 relay - this is the safest and best way.

Just adding a 20 amp fuse will void your warranty if you have any electrical issues and if it is wired to some electronic component - which it fries - that could be big bucks. Spend the time and the money and get a relay.

Cheers

Peter
 
I suggest installing a new fuse in the engine bay fuse box in the position shown in the picture below. You will need a midi size fuse - the smallest I could find was 30 Amps (If someone finds a source for 20 Amp ones please let me know). To install you will need two metric M5 nuts either locking type or with lock washers. If you use the 30 amp fuse, use at least AWG 14 wire.
 

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Ok, I got the horn and I gotta say, the sintructions suck. I want to wire this thing up properly, without any shortcuts. Do I just plug the relay into the empty slot in my fusebox? Where do I find the wiring that comes from the horn button to hook up to the relay? Anyone have any detailed wiring instructions doing it the right way (meaning not using the stock horns wiring.) TIA
 

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