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Old 03-14-2013, 11:28 AM   #21
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I don't know if the factory horn uses a relay but if it doesn't and the new horn draws appreciably more current, then there's risk of burning up the horn switch. A relay is essentially a remotely controlled switch and is used primarily when you want to either avoid switching hi current thru a switch or want to minimize the voltage drop by placing the source closer to the device.

Back in the day, most horns were on a relay but I don't know if today's horns draw lots of current or not.
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Old 05-28-2015, 02:48 AM   #22
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Cadillac horn installment in sprinter

Russ240. Tell me about the installment of the Cadillac horn. I just bought the same horn off eBay. Did you require any other components or converters? Thx


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I bought a set of the old school 4-tone cadillac horns. ACD and F notes IIRC. Sounds like a chord from a pipe organ when you sound them. Pretty loud, I've heard louder but these get the job done and I love to hear them! I see the seller I got them from on Ebay a couple of years ago is still selling them. Cadillac DeVille Buick 4 Note Horn Set A C D F 120 DB Loud Impressive | eBay
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Old 05-28-2015, 04:07 AM   #23
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I used the quartet of Cad horns on another vehicle. Wired them with relay. OEM wire triggered relay.
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Old 05-29-2015, 12:23 AM   #24
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Russ240. Tell me about the installment of the Cadillac horn.
Unfortunately I can't provide details because my mechanic did the install and while he may have told me at the time, I've slept since then so I don't recall. However, slowmover's use if a relay is a good idea. I'm pretty sure mine are just running off the stock wiring but that's not the best way to do it.
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Old 05-29-2015, 06:32 AM   #25
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We replaced our Interstate horn two months ago. This post contains step by step pics for an older T1N:

THE INTERSTATE BLOG: REPLACING THE HORN ON AN AIRSTREAM INTERSTATE
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Old 05-29-2015, 09:56 AM   #26
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We replaced our Interstate horn two months ago. This post contains step by step pics for an older T1N:

THE INTERSTATE BLOG: REPLACING THE HORN ON AN AIRSTREAM INTERSTATE
Fantastic write up!!! So well explained that I may try to do this myself. Thank you for sharing.
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Old 05-29-2015, 03:00 PM   #27
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I replaced my horn with the HELLA TWINS some time ago and now get some attention from the BIG BOYS. Well worth the time and small investment, and no it does not scare the c--p out of any 2 or 4 legged animals.
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